2122102220021 has 16 divisors (see below), whose sum is σ = 2462151137280. Its totient is φ = 1791291466800.

The previous prime is 2122102219981. The next prime is 2122102220039. The reversal of 2122102220021 is 1200222012212.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 2122102220021 - 2²² = 2122098025717 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2122102229021) 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, 1033496 + ... + 2304846.

It is an arithmetic number, because the mean of its divisors is an integer number (153884446080).

Almost surely, 2^{2122102220021} is an apocalyptic number.

It is an amenable number.

2122102220021 is a deficient number, since it is larger than the sum of its proper divisors (340048917259).

2122102220021 is a wasteful number, since it uses less digits than its factorization.

2122102220021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1274984.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 2122102220021 its reverse (1200222012212), we get a palindrome (3322324232233).

The spelling of 2122102220021 in words is "two trillion, one hundred twenty-two billion, one hundred two million, two hundred twenty thousand, twenty-one".