122121111210 has 32 divisors (see below), whose sum is σ = 334960762752. Its totient is φ = 27913396800.

The previous prime is 122121111199. The next prime is 122121111247. The reversal of 122121111210 is 12111121221.

It is a happy number.

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 122121111210.

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, 290764341 + ... + 290764760.

It is an arithmetic number, because the mean of its divisors is an integer number (10467523836).

Almost surely, 2^122121111210 is an apocalyptic number.

122121111210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

122121111210 is an abundant number, since it is smaller than the sum of its proper divisors (212839651542).

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

122121111210 is a wasteful number, since it uses less digits than its factorization.

122121111210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 581529118.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 122121111210 its reverse (12111121221), we get a palindrome (134232232431).

The spelling of 122121111210 in words is "one hundred twenty-two billion, one hundred twenty-one million, one hundred eleven thousand, two hundred ten".