21122254504102 has 16 divisors (see below), whose sum is σ = 31704675685200. Its totient is φ = 10554031431328.

The previous prime is 21122254504097. The next prime is 21122254504121. The reversal of 21122254504102 is 20140545222112.

It is a super-2 number, since 2×21122254504102² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

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, 19182768 + ... + 20253964.

It is an arithmetic number, because the mean of its divisors is an integer number (1981542230325).

Almost surely, 2^{21122254504102} is an apocalyptic number.

21122254504102 is a deficient number, since it is larger than the sum of its proper divisors (10582421181098).

21122254504102 is a wasteful number, since it uses less digits than its factorization.

21122254504102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1077815.

The product of its (nonzero) digits is 12800, while the sum is 31.

Adding to 21122254504102 its reverse (20140545222112), we get a palindrome (41262799726214).

The spelling of 21122254504102 in words is "twenty-one trillion, one hundred twenty-two billion, two hundred fifty-four million, five hundred four thousand, one hundred two".