21213404546122 has 16 divisors (see below), whose sum is σ = 32031214638912. Its totient is φ = 10536334660800.

The previous prime is 21213404546107. The next prime is 21213404546137. The reversal of 21213404546122 is 22164540431212.

It is an interprime number because it is at equal distance from previous prime (21213404546107) and next prime (21213404546137).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28504738 + ... + 29239474.

It is an arithmetic number, because the mean of its divisors is an integer number (2001950914932).

Almost surely, 2^{21213404546122} is an apocalyptic number.

21213404546122 is a deficient number, since it is larger than the sum of its proper divisors (10817810092790).

21213404546122 is a wasteful number, since it uses less digits than its factorization.

21213404546122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 830493.

The product of its (nonzero) digits is 92160, while the sum is 37.

Adding to 21213404546122 its reverse (22164540431212), we get a palindrome (43377944977334).

The spelling of 21213404546122 in words is "twenty-one trillion, two hundred thirteen billion, four hundred four million, five hundred forty-six thousand, one hundred twenty-two".