161121010002 has 32 divisors (see below), whose sum is σ = 341283160320. Its totient is φ = 50568163920.

The previous prime is 161121009977. The next prime is 161121010027. The reversal of 161121010002 is 200010121161.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (161121009977) and next prime (161121010027).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4316824 + ... + 4353987.

It is an arithmetic number, because the mean of its divisors is an integer number (10665098760).

Almost surely, 2^161121010002 is an apocalyptic number.

161121010002 is an abundant number, since it is smaller than the sum of its proper divisors (180162150318).

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

161121010002 is a wasteful number, since it uses less digits than its factorization.

161121010002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8670998.

The product of its (nonzero) digits is 24, while the sum is 15.

Adding to 161121010002 its reverse (200010121161), we get a palindrome (361131131163).

The spelling of 161121010002 in words is "one hundred sixty-one billion, one hundred twenty-one million, ten thousand, two".