22002120021121 has 16 divisors (see below), whose sum is σ = 22291012187136. Its totient is φ = 21713800093776.

The previous prime is 22002120021031. The next prime is 22002120021173. The reversal of 22002120021121 is 12112002120022.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 22002120021121 - 2¹⁵ = 22002119988353 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22002120021095 and 22002120021104.

It is not an unprimeable number, because it can be changed into a prime (22002120061121) 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, 1187817766 + ... + 1187836288.

It is an arithmetic number, because the mean of its divisors is an integer number (1393188261696).

Almost surely, 2^{22002120021121} is an apocalyptic number.

It is an amenable number.

22002120021121 is a deficient number, since it is larger than the sum of its proper divisors (288892166015).

22002120021121 is a wasteful number, since it uses less digits than its factorization.

22002120021121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33132.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 22002120021121 its reverse (12112002120022), we get a palindrome (34114122141143).

The spelling of 22002120021121 in words is "twenty-two trillion, two billion, one hundred twenty million, twenty-one thousand, one hundred twenty-one".