1021930940836 has 81 divisors (see below), whose sum is σ = 1972901509761. Its totient is φ = 462962599008.

The previous prime is 1021930940813. The next prime is 1021930940881. The reversal of 1021930940836 is 6380490391201.

It is a happy number.

The square root of 1021930940836 is 1010906.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 151173216100 + 870757724736 = 388810^2 + 933144^2 .

It is a super-3 number, since 3×1021930940836³ (a number of 37 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 1550729475 + ... + 1550730133.

Almost surely, 2^{1021930940836} is an apocalyptic number.

1021930940836 is the 1010906-th square number.

It is an amenable number.

1021930940836 is a deficient number, since it is larger than the sum of its proper divisors (950970568925).

1021930940836 is an frugal number, since it uses more digits than its factorization.

1021930940836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1466 (or 733 counting only the distinct ones).

The product of its (nonzero) digits is 279936, while the sum is 46.

The spelling of 1021930940836 in words is "one trillion, twenty-one billion, nine hundred thirty million, nine hundred forty thousand, eight hundred thirty-six".