121231670 has 64 divisors (see below), whose sum is σ = 260620416. Its totient is φ = 39736320.

The previous prime is 121231661. The next prime is 121231679. The reversal of 121231670 is 76132121.

It is an interprime number because it is at equal distance from previous prime (121231661) and next prime (121231679).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121231679) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 151712 + ... + 152508.

It is an arithmetic number, because the mean of its divisors is an integer number (4072194).

Almost surely, 2^121231670 is an apocalyptic number.

121231670 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121231670 is an abundant number, since it is smaller than the sum of its proper divisors (139388746).

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

121231670 is a wasteful number, since it uses less digits than its factorization.

121231670 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 905.

The product of its (nonzero) digits is 504, while the sum is 23.

The square root of 121231670 is about 11010.5254188890. The cubic root of 121231670 is about 494.9242070125.

Adding to 121231670 its reverse (76132121), we get a palindrome (197363791).

The spelling of 121231670 in words is "one hundred twenty-one million, two hundred thirty-one thousand, six hundred seventy".