21120022001231 has 2 divisors, whose sum is σ = 21120022001232. Its totient is φ = 21120022001230.

The previous prime is 21120022001201. The next prime is 21120022001249. The reversal of 21120022001231 is 13210022002112.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21120022001231 - 2²⁶ = 21119954892367 is a prime.

It is a super-2 number, since 2×21120022001231² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21120022001201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10560011000615 + 10560011000616.

It is an arithmetic number, because the mean of its divisors is an integer number (10560011000616).

Almost surely, 2^{21120022001231} is an apocalyptic number.

21120022001231 is a deficient number, since it is larger than the sum of its proper divisors (1).

21120022001231 is an equidigital number, since it uses as much as digits as its factorization.

21120022001231 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 21120022001231 its reverse (13210022002112), we get a palindrome (34330044003343).

The spelling of 21120022001231 in words is "twenty-one trillion, one hundred twenty billion, twenty-two million, one thousand, two hundred thirty-one".