2021010403156 has 12 divisors (see below), whose sum is σ = 3632356535668. Its totient is φ = 983194250112.

The previous prime is 2021010403081. The next prime is 2021010403157. The reversal of 2021010403156 is 6513040101202.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1340523996100 + 680486407056 = 1157810^2 + 824916^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 2021010403156.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2021010403157) 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, 6827737701 + ... + 6827737996.

Almost surely, 2^{2021010403156} is an apocalyptic number.

It is an amenable number.

2021010403156 is a deficient number, since it is larger than the sum of its proper divisors (1611346132512).

2021010403156 is a wasteful number, since it uses less digits than its factorization.

2021010403156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13655475738 (or 13655475736 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 25.

Adding to 2021010403156 its reverse (6513040101202), we get a palindrome (8534050504358).

The spelling of 2021010403156 in words is "two trillion, twenty-one billion, ten million, four hundred three thousand, one hundred fifty-six".