21222100010121 has 8 divisors (see below), whose sum is σ = 28309374409824. Its totient is φ = 14141446141920.

The previous prime is 21222100010101. The next prime is 21222100010141. The reversal of 21222100010121 is 12101000122212.

It is an interprime number because it is at equal distance from previous prime (21222100010101) and next prime (21222100010141).

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

It is not a de Polignac number, because 21222100010121 - 2²¹ = 21222097912969 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21222100010121.

It is not an unprimeable number, because it can be changed into a prime (21222100010101) 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, 1655125395 + ... + 1655138216.

It is an arithmetic number, because the mean of its divisors is an integer number (3538671801228).

Almost surely, 2^{21222100010121} is an apocalyptic number.

It is an amenable number.

21222100010121 is a deficient number, since it is larger than the sum of its proper divisors (7087274399703).

21222100010121 is a wasteful number, since it uses less digits than its factorization.

21222100010121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3310265751.

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

Adding to 21222100010121 its reverse (12101000122212), we get a palindrome (33323100132333).

The spelling of 21222100010121 in words is "twenty-one trillion, two hundred twenty-two billion, one hundred million, ten thousand, one hundred twenty-one".