21621411422362 has 16 divisors (see below), whose sum is σ = 32589787829760. Its totient is φ = 10758185227152.

The previous prime is 21621411422341. The next prime is 21621411422363. The reversal of 21621411422362 is 26322411412612.

It is not an unprimeable number, because it can be changed into a prime (21621411422363) 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, 7914537 + ... + 10289932.

It is an arithmetic number, because the mean of its divisors is an integer number (2036861739360).

Almost surely, 2^{21621411422362} is an apocalyptic number.

21621411422362 is a deficient number, since it is larger than the sum of its proper divisors (10968376407398).

21621411422362 is a wasteful number, since it uses less digits than its factorization.

21621411422362 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18207357.

The product of its digits is 55296, while the sum is 37.

Adding to 21621411422362 its reverse (26322411412612), we get a palindrome (47943822834974).

It can be divided in two parts, 2162141 and 1422362, that added together give a triangular number (3584503 = T₂₆₇₇).

The spelling of 21621411422362 in words is "twenty-one trillion, six hundred twenty-one billion, four hundred eleven million, four hundred twenty-two thousand, three hundred sixty-two".