22012400210421 has 16 divisors (see below), whose sum is σ = 29903907939840. Its totient is φ = 14397917976000.

The previous prime is 22012400210341. The next prime is 22012400210461. The reversal of 22012400210421 is 12401200421022.

It is not a de Polignac number, because 22012400210421 - 2¹⁷ = 22012400079349 is a prime.

It is a super-4 number, since 4×22012400210421⁴ (a number of 54 digits) contains 4444 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22012400210461) 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, 18972796 + ... + 20099546.

It is an arithmetic number, because the mean of its divisors is an integer number (1868994246240).

Almost surely, 2^{22012400210421} is an apocalyptic number.

It is an amenable number.

22012400210421 is a deficient number, since it is larger than the sum of its proper divisors (7891507729419).

22012400210421 is a wasteful number, since it uses less digits than its factorization.

22012400210421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1249676.

The product of its (nonzero) digits is 512, while the sum is 21.

Adding to 22012400210421 its reverse (12401200421022), we get a palindrome (34413600631443).

The spelling of 22012400210421 in words is "twenty-two trillion, twelve billion, four hundred million, two hundred ten thousand, four hundred twenty-one".