1021220123133 has 32 divisors (see below), whose sum is σ = 1647763513344. Its totient is φ = 549200754432.

The previous prime is 1021220123113. The next prime is 1021220123141. The reversal of 1021220123133 is 3313210221201.

It is not a de Polignac number, because 1021220123133 - 2⁵ = 1021220123101 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021220123113) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8812816 + ... + 8927942.

It is an arithmetic number, because the mean of its divisors is an integer number (51492609792).

Almost surely, 2^{1021220123133} is an apocalyptic number.

It is an amenable number.

1021220123133 is a deficient number, since it is larger than the sum of its proper divisors (626543390211).

1021220123133 is a wasteful number, since it uses less digits than its factorization.

1021220123133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140001.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 1021220123133 its reverse (3313210221201), we get a palindrome (4334430344334).

The spelling of 1021220123133 in words is "one trillion, twenty-one billion, two hundred twenty million, one hundred twenty-three thousand, one hundred thirty-three".