691220110102002 has 48 divisors (see below), whose sum is σ = 1612953934185048. Its totient is φ = 212668999511040.

The previous prime is 691220110101967. The next prime is 691220110102069. The reversal of 691220110102002 is 200201011022196.

It can be written as a sum of positive squares in 4 ways, for example, as 333959872135761 + 357260237966241 = 18274569^2 + 18901329^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 94460449 + ... + 101514612.

Almost surely, 2^{691220110102002} is an apocalyptic number.

691220110102002 is an abundant number, since it is smaller than the sum of its proper divisors (921733824083046).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

691220110102002 is a wasteful number, since it uses less digits than its factorization.

691220110102002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195990155 (or 195990152 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 27.

Adding to 691220110102002 its reverse (200201011022196), we get a palindrome (891421121124198).

The spelling of 691220110102002 in words is "six hundred ninety-one trillion, two hundred twenty billion, one hundred ten million, one hundred two thousand, two".