1021000012122 has 32 divisors (see below), whose sum is σ = 2107930927104. Its totient is φ = 329345478000.

The previous prime is 1021000012099. The next prime is 1021000012141. The reversal of 1021000012122 is 2212100001201.

It is a junction number, because it is equal to n+sod(n) for n = 1021000012098 and 1021000012107.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9904747 + ... + 10007297.

It is an arithmetic number, because the mean of its divisors is an integer number (65872841472).

Almost surely, 2^{1021000012122} is an apocalyptic number.

1021000012122 is an abundant number, since it is smaller than the sum of its proper divisors (1086930914982).

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

1021000012122 is a wasteful number, since it uses less digits than its factorization.

1021000012122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156114.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 1021000012122 its reverse (2212100001201), we get a palindrome (3233100013323).

The spelling of 1021000012122 in words is "one trillion, twenty-one billion, twelve thousand, one hundred twenty-two".