121210122220 has 96 divisors (see below), whose sum is σ = 284384120832. Its totient is φ = 43024800000.

The previous prime is 121210122181. The next prime is 121210122263. The reversal of 121210122220 is 22221012121.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 121210122194 and 121210122203.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1539205 + ... + 1616035.

It is an arithmetic number, because the mean of its divisors is an integer number (2962334592).

Almost surely, 2^121210122220 is an apocalyptic number.

121210122220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121210122220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (142192060416).

121210122220 is an abundant number, since it is smaller than the sum of its proper divisors (163173998612).

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

121210122220 is a wasteful number, since it uses less digits than its factorization.

121210122220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77023 (or 77021 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 121210122220 its reverse (22221012121), we get a palindrome (143431134341).

It can be divided in two parts, 1212101 and 22220, that added together give a palindrome (1234321).

The spelling of 121210122220 in words is "one hundred twenty-one billion, two hundred ten million, one hundred twenty-two thousand, two hundred twenty".