122115511221 has 16 divisors (see below), whose sum is σ = 179090522688. Its totient is φ = 74009398320.

The previous prime is 122115511201. The next prime is 122115511253.

122115511221 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 122115511221 - 2⁶ = 122115511157 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 122115511191 and 122115511200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122115511201) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15287206 + ... + 15295191.

It is an arithmetic number, because the mean of its divisors is an integer number (11193157668).

Almost surely, 2^122115511221 is an apocalyptic number.

122115511221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

122115511221 is a deficient number, since it is larger than the sum of its proper divisors (56975011467).

122115511221 is an equidigital number, since it uses as much as digits as its factorization.

122115511221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30582433 (or 30582411 counting only the distinct ones).

The product of its digits is 400, while the sum is 24.

It can be divided in two parts, 122115 and 511221, that added together give a palindrome (633336).

The spelling of 122115511221 in words is "one hundred twenty-two billion, one hundred fifteen million, five hundred eleven thousand, two hundred twenty-one".