121112220210 has 32 divisors (see below), whose sum is σ = 290773229760. Its totient is φ = 32285047488.

The previous prime is 121112220197. The next prime is 121112220221. The reversal of 121112220210 is 12022211121.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 121112220210.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 636045 + ... + 804224.

It is an arithmetic number, because the mean of its divisors is an integer number (9086663430).

Almost surely, 2^121112220210 is an apocalyptic number.

121112220210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121112220210 is an abundant number, since it is smaller than the sum of its proper divisors (169661009550).

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

121112220210 is a wasteful number, since it uses less digits than its factorization.

121112220210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1443082.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 121112220210 its reverse (12022211121), we get a palindrome (133134431331).

The spelling of 121112220210 in words is "one hundred twenty-one billion, one hundred twelve million, two hundred twenty thousand, two hundred ten".