391020330212 has 6 divisors (see below), whose sum is σ = 684285577878. Its totient is φ = 195510165104.

The previous prime is 391020330203. The next prime is 391020330251. The reversal of 391020330212 is 212033020193.

It can be written as a sum of positive squares in only one way, i.e., 213597411556 + 177422918656 = 462166^2 + 421216^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48877541273 + ... + 48877541280.

It is an arithmetic number, because the mean of its divisors is an integer number (114047596313).

Almost surely, 2^391020330212 is an apocalyptic number.

It is an amenable number.

391020330212 is a deficient number, since it is larger than the sum of its proper divisors (293265247666).

391020330212 is a wasteful number, since it uses less digits than its factorization.

391020330212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97755082557 (or 97755082555 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 26.

The spelling of 391020330212 in words is "three hundred ninety-one billion, twenty million, three hundred thirty thousand, two hundred twelve".