211421142 has 12 divisors (see below), whose sum is σ = 458079180. Its totient is φ = 70473708.

The previous prime is 211421141. The next prime is 211421149. The reversal of 211421142 is 241124112.

211421142 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 11745619 = 211421142 / (2 + 1 + 1 + 4 + 2 + 1 + 1 + 4 + 2).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211421141) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5872792 + ... + 5872827.

It is an arithmetic number, because the mean of its divisors is an integer number (38173265).

Almost surely, 2^211421142 is an apocalyptic number.

211421142 is an abundant number, since it is smaller than the sum of its proper divisors (246658038).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

211421142 is a wasteful number, since it uses less digits than its factorization.

211421142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11745627 (or 11745624 counting only the distinct ones).

The product of its digits is 128, while the sum is 18.

The square root of 211421142 is about 14540.3281255961. The cubic root of 211421142 is about 595.7300005959.

Adding to 211421142 its reverse (241124112), we get a palindrome (452545254).

The spelling of 211421142 in words is "two hundred eleven million, four hundred twenty-one thousand, one hundred forty-two".