1021128311212 has 12 divisors (see below), whose sum is σ = 1787562967120. Its totient is φ = 510396034896.

The previous prime is 1021128311201. The next prime is 1021128311227. The reversal of 1021128311212 is 2121138211201.

It is a super-2 number, since 2×1021128311212² (a number of 25 digits) contains 22 as substring.

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, 42016512 + ... + 42040807.

Almost surely, 2^{1021128311212} is an apocalyptic number.

It is an amenable number.

1021128311212 is a deficient number, since it is larger than the sum of its proper divisors (766434655908).

1021128311212 is a wasteful number, since it uses less digits than its factorization.

1021128311212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84060360 (or 84060358 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 25.

The spelling of 1021128311212 in words is "one trillion, twenty-one billion, one hundred twenty-eight million, three hundred eleven thousand, two hundred twelve".