121222151010 has 48 divisors (see below), whose sum is σ = 315312431616. Its totient is φ = 32312077344.

The previous prime is 121222150963. The next prime is 121222151051. The reversal of 121222151010 is 10151222121.

121222151010 is a `hidden beast` number, since 1 + 2 + 122 + 21 + 510 + 10 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

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, 75714 + ... + 498173.

It is an arithmetic number, because the mean of its divisors is an integer number (6569008992).

Almost surely, 2^121222151010 is an apocalyptic number.

121222151010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121222151010 is an abundant number, since it is smaller than the sum of its proper divisors (194090280606).

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

121222151010 is a wasteful number, since it uses less digits than its factorization.

121222151010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 576247 (or 576244 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 18.

Adding to 121222151010 its reverse (10151222121), we get a palindrome (131373373131).

The spelling of 121222151010 in words is "one hundred twenty-one billion, two hundred twenty-two million, one hundred fifty-one thousand, ten".