121212220222002 has 64 divisors (see below), whose sum is σ = 306432556786944. Its totient is φ = 31104056505600.

The previous prime is 121212220221991. The next prime is 121212220222003. The reversal of 121212220222002 is 200222022212121.

It is a super-2 number, since 2×121212220222002² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 121212220222002.

It is not an unprimeable number, because it can be changed into a prime (121212220222003) 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, 2999985249 + ... + 3000025652.

It is an arithmetic number, because the mean of its divisors is an integer number (4788008699796).

Almost surely, 2^{121212220222002} is an apocalyptic number.

121212220222002 is an abundant number, since it is smaller than the sum of its proper divisors (185220336564942).

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

121212220222002 is a wasteful number, since it uses less digits than its factorization.

121212220222002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6000010963.

The product of its (nonzero) digits is 512, while the sum is 21.

Adding to 121212220222002 its reverse (200222022212121), we get a palindrome (321434242434123).

The spelling of 121212220222002 in words is "one hundred twenty-one trillion, two hundred twelve billion, two hundred twenty million, two hundred twenty-two thousand, two".