391001011012 has 6 divisors (see below), whose sum is σ = 684251769278. Its totient is φ = 195500505504.

The previous prime is 391001010997. The next prime is 391001011021. The reversal of 391001011012 is 210110100193.

It can be written as a sum of positive squares in only one way, i.e., 367252968196 + 23748042816 = 606014^2 + 154104^2 .

It is a super-2 number, since 2×391001011012² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48875126373 + ... + 48875126380.

Almost surely, 2^391001011012 is an apocalyptic number.

It is an amenable number.

391001011012 is a deficient number, since it is larger than the sum of its proper divisors (293250758266).

391001011012 is a wasteful number, since it uses less digits than its factorization.

391001011012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97750252757 (or 97750252755 counting only the distinct ones).

The product of its (nonzero) digits is 54, while the sum is 19.

The spelling of 391001011012 in words is "three hundred ninety-one billion, one million, eleven thousand, twelve".