121222131012 has 48 divisors (see below), whose sum is σ = 314564839680. Its totient is φ = 40370703264.

The previous prime is 121222130969. The next prime is 121222131029. The reversal of 121222131012 is 210131222121.

121222131012 is a `hidden beast` number, since 121 + 2 + 221 + 310 + 12 = 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 pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 389683 + ... + 627930.

It is an arithmetic number, because the mean of its divisors is an integer number (6553434160).

Almost surely, 2^121222131012 is an apocalyptic number.

121222131012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

121222131012 is an abundant number, since it is smaller than the sum of its proper divisors (193342708668).

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

121222131012 is a wasteful number, since it uses less digits than its factorization.

121222131012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1018729 (or 1018721 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 121222131012 its reverse (210131222121), we get a palindrome (331353353133).

The spelling of 121222131012 in words is "one hundred twenty-one billion, two hundred twenty-two million, one hundred thirty-one thousand, twelve".