121161630 has 16 divisors (see below), whose sum is σ = 290787984. Its totient is φ = 32309760.

The previous prime is 121161619. The next prime is 121161637. The reversal of 121161630 is 36161121.

It is a junction number, because it is equal to n+sod(n) for n = 121161597 and 121161606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121161637) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2019331 + ... + 2019390.

It is an arithmetic number, because the mean of its divisors is an integer number (18174249).

Almost surely, 2^121161630 is an apocalyptic number.

121161630 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121161630 is an abundant number, since it is smaller than the sum of its proper divisors (169626354).

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

121161630 is a wasteful number, since it uses less digits than its factorization.

121161630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4038731.

The product of its (nonzero) digits is 216, while the sum is 21.

The square root of 121161630 is about 11007.3443663765. The cubic root of 121161630 is about 494.8288766717.

The spelling of 121161630 in words is "one hundred twenty-one million, one hundred sixty-one thousand, six hundred thirty".