122001121020021 has 16 divisors (see below), whose sum is σ = 165446350552704. Its totient is φ = 79956513840384.

The previous prime is 122001121020007. The next prime is 122001121020043. The reversal of 122001121020021 is 120020121100221.

It is not a de Polignac number, because 122001121020021 - 2¹⁸ = 122001120757877 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122001121022021) 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, 1440927136 + ... + 1441011801.

It is an arithmetic number, because the mean of its divisors is an integer number (10340396909544).

Almost surely, 2^{122001121020021} is an apocalyptic number.

It is an amenable number.

122001121020021 is a deficient number, since it is larger than the sum of its proper divisors (43445229532683).

122001121020021 is a wasteful number, since it uses less digits than its factorization.

122001121020021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2881939180.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 122001121020021 its reverse (120020121100221), we get a palindrome (242021242120242).

The spelling of 122001121020021 in words is "one hundred twenty-two trillion, one billion, one hundred twenty-one million, twenty thousand, twenty-one".