1220120142 has 16 divisors (see below), whose sum is σ = 2440634112. Its totient is φ = 406641080.

The previous prime is 1220120137. The next prime is 1220120147. The reversal of 1220120142 is 2410210221.

It is an interprime number because it is at equal distance from previous prime (1220120137) and next prime (1220120147).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220120147) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37483 + ... + 62009.

It is an arithmetic number, because the mean of its divisors is an integer number (152539632).

Almost surely, 2^1220120142 is an apocalyptic number.

1220120142 is an abundant number, since it is smaller than the sum of its proper divisors (1220513970).

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

1220120142 is a wasteful number, since it uses less digits than its factorization.

1220120142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32823.

The product of its (nonzero) digits is 64, while the sum is 15.

The square root of 1220120142 is about 34930.2181785342. The cubic root of 1220120142 is about 1068.5648042158.

Adding to 1220120142 its reverse (2410210221), we get a palindrome (3630330363).

The spelling of 1220120142 in words is "one billion, two hundred twenty million, one hundred twenty thousand, one hundred forty-two".