12220022012121 has 72 divisors (see below), whose sum is σ = 22876182635904. Its totient is φ = 6212998088640.

The previous prime is 12220022012117. The next prime is 12220022012123. The reversal of 12220022012121 is 12121022002221.

It is a happy number.

12220022012121 is a `hidden beast` number, since 12 + 220 + 0 + 220 + 1 + 212 + 1 = 666.

It is not a de Polignac number, because 12220022012121 - 2² = 12220022012117 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12220022012094 and 12220022012103.

It is not an unprimeable number, because it can be changed into a prime (12220022012123) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 26570650 + ... + 27026643.

It is an arithmetic number, because the mean of its divisors is an integer number (317724758832).

Almost surely, 2^{12220022012121} is an apocalyptic number.

12220022012121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12220022012121 is a deficient number, since it is larger than the sum of its proper divisors (10656160623783).

12220022012121 is a wasteful number, since it uses less digits than its factorization.

12220022012121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53597371 (or 53597361 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 12220022012121 its reverse (12121022002221), we get a palindrome (24341044014342).

The spelling of 12220022012121 in words is "twelve trillion, two hundred twenty billion, twenty-two million, twelve thousand, one hundred twenty-one".