1691100221202 has 64 divisors (see below), whose sum is σ = 4481590671360. Its totient is φ = 462164033232.

The previous prime is 1691100221197. The next prime is 1691100221221. The reversal of 1691100221202 is 2021220011961.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 97248048 + ... + 97265435.

It is an arithmetic number, because the mean of its divisors is an integer number (70024854240).

Almost surely, 2^{1691100221202} is an apocalyptic number.

1691100221202 is an abundant number, since it is smaller than the sum of its proper divisors (2790490450158).

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

1691100221202 is a wasteful number, since it uses less digits than its factorization.

1691100221202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 194513524 (or 194513518 counting only the distinct ones).

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

The spelling of 1691100221202 in words is "one trillion, six hundred ninety-one billion, one hundred million, two hundred twenty-one thousand, two hundred two".