211121402 has 16 divisors (see below), whose sum is σ = 339907752. Its totient is φ = 97989120.

The previous prime is 211121389. The next prime is 211121429. The reversal of 211121402 is 204121112.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 209931121 + 1190281 = 14489^2 + 1091^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40049 + ... + 45012.

Almost surely, 2^211121402 is an apocalyptic number.

211121402 is a deficient number, since it is larger than the sum of its proper divisors (128786350).

211121402 is a wasteful number, since it uses less digits than its factorization.

211121402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85153.

The product of its (nonzero) digits is 32, while the sum is 14.

The square root of 211121402 is about 14530.0172745940. The cubic root of 211121402 is about 595.4483375592.

Adding to 211121402 its reverse (204121112), we get a palindrome (415242514).

The spelling of 211121402 in words is "two hundred eleven million, one hundred twenty-one thousand, four hundred two".