22001022112121 has 8 divisors (see below), whose sum is σ = 24140453871240. Its totient is φ = 19925453987712.

The previous prime is 22001022112109. The next prime is 22001022112133. The reversal of 22001022112121 is 12121122010022.

It is an interprime number because it is at equal distance from previous prime (22001022112109) and next prime (22001022112133).

It can be written as a sum of positive squares in 4 ways, for example, as 7145116111225 + 14855906000896 = 2673035^2 + 3854336^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 22001022112121 - 2⁶ = 22001022112057 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 22001022112121.

It is not an unprimeable number, because it can be changed into a prime (22001022112021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15965907956 + ... + 15965909333.

It is an arithmetic number, because the mean of its divisors is an integer number (3017556733905).

Almost surely, 2^{22001022112121} is an apocalyptic number.

It is an amenable number.

22001022112121 is a deficient number, since it is larger than the sum of its proper divisors (2139431759119).

22001022112121 is a wasteful number, since it uses less digits than its factorization.

22001022112121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31931817355.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 22001022112121 its reverse (12121122010022), we get a palindrome (34122144122143).

The spelling of 22001022112121 in words is "twenty-two trillion, one billion, twenty-two million, one hundred twelve thousand, one hundred twenty-one".