122121022012221 has 32 divisors (see below), whose sum is σ = 163142175449088. Its totient is φ = 81257134210560.

The previous prime is 122121022012051. The next prime is 122121022012229. The reversal of 122121022012221 is 122210220121221.

It is not a de Polignac number, because 122121022012221 - 2²² = 122121017817917 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122121022012229) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 23699011981 + ... + 23699017133.

It is an arithmetic number, because the mean of its divisors is an integer number (5098192982784).

Almost surely, 2^{122121022012221} is an apocalyptic number.

It is an amenable number.

122121022012221 is a deficient number, since it is larger than the sum of its proper divisors (41021153436867).

122121022012221 is a wasteful number, since it uses less digits than its factorization.

122121022012221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11841.

The product of its (nonzero) digits is 256, while the sum is 21.

Adding to 122121022012221 its reverse (122210220121221), we get a palindrome (244331242133442).

The spelling of 122121022012221 in words is "one hundred twenty-two trillion, one hundred twenty-one billion, twenty-two million, twelve thousand, two hundred twenty-one".