1021205996 has 12 divisors (see below), whose sum is σ = 1881169080. Its totient is φ = 483729120.

The previous prime is 1021205959. The next prime is 1021206013. The reversal of 1021205996 is 6995021201.

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, 6718385 + ... + 6718536.

It is an arithmetic number, because the mean of its divisors is an integer number (156764090).

Almost surely, 2^1021205996 is an apocalyptic number.

It is an amenable number.

1021205996 is a deficient number, since it is larger than the sum of its proper divisors (859963084).

1021205996 is a wasteful number, since it uses less digits than its factorization.

1021205996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13436944 (or 13436942 counting only the distinct ones).

The product of its (nonzero) digits is 9720, while the sum is 35.

The square root of 1021205996 is about 31956.3138675286. The cubic root of 1021205996 is about 1007.0192797643.

It can be divided in two parts, 1021205 and 996, that added together give a palindrome (1022201).

The spelling of 1021205996 in words is "one billion, twenty-one million, two hundred five thousand, nine hundred ninety-six".