1022120156 has 12 divisors (see below), whose sum is σ = 1795032792. Its totient is φ = 509253648.

The previous prime is 1022120149. The next prime is 1022120159. The reversal of 1022120156 is 6510212201.

It is a super-2 number, since 2×1022120156² = 2089459226602928672, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1022120159) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 450335 + ... + 452598.

It is an arithmetic number, because the mean of its divisors is an integer number (149586066).

Almost surely, 2^1022120156 is an apocalyptic number.

It is an amenable number.

1022120156 is a deficient number, since it is larger than the sum of its proper divisors (772912636).

1022120156 is a wasteful number, since it uses less digits than its factorization.

1022120156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 903220 (or 903218 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 20.

The square root of 1022120156 is about 31970.6139446836. The cubic root of 1022120156 is about 1007.3196769391.

Adding to 1022120156 its reverse (6510212201), we get a palindrome (7532332357).

The spelling of 1022120156 in words is "one billion, twenty-two million, one hundred twenty thousand, one hundred fifty-six".