1021013123212 has 12 divisors (see below), whose sum is σ = 1835064127120. Its totient is φ = 496709086896.

The previous prime is 1021013123131. The next prime is 1021013123261. The reversal of 1021013123212 is 2123213101201.

It is a super-2 number, since 2×1021013123212² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1021013123212.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3449368512 + ... + 3449368807.

Almost surely, 2^{1021013123212} is an apocalyptic number.

It is an amenable number.

1021013123212 is a deficient number, since it is larger than the sum of its proper divisors (814051003908).

1021013123212 is a wasteful number, since it uses less digits than its factorization.

1021013123212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6898737360 (or 6898737358 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 1021013123212 its reverse (2123213101201), we get a palindrome (3144226224413).

The spelling of 1021013123212 in words is "one trillion, twenty-one billion, thirteen million, one hundred twenty-three thousand, two hundred twelve".