122112121211220 has 96 divisors (see below), whose sum is σ = 391460330435328. Its totient is φ = 27861231808512.

The previous prime is 122112121211207. The next prime is 122112121211317. The reversal of 122112121211220 is 22112121211221.

It is a super-2 number, since 2×122112121211220² (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 congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 260756317 + ... + 261224196.

It is an arithmetic number, because the mean of its divisors is an integer number (4077711775368).

Almost surely, 2^{122112121211220} is an apocalyptic number.

122112121211220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

122112121211220 is an abundant number, since it is smaller than the sum of its proper divisors (269348209224108).

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

122112121211220 is a wasteful number, since it uses less digits than its factorization.

122112121211220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 521981089 (or 521981087 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 21.

Adding to 122112121211220 its reverse (22112121211221), we get a palindrome (144224242422441).

Subtracting from 122112121211220 its reverse (22112121211221), we obtain a palindrome (99999999999999).

The spelling of 122112121211220 in words is "one hundred twenty-two trillion, one hundred twelve billion, one hundred twenty-one million, two hundred eleven thousand, two hundred twenty".