21221012022110 has 32 divisors (see below), whose sum is σ = 40465252078272. Its totient is φ = 7985037544960.

The previous prime is 21221012022109. The next prime is 21221012022121. The reversal of 21221012022110 is 1122021012212.

It is a super-2 number, since 2×21221012022110² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31299026 + ... + 31969845.

It is an arithmetic number, because the mean of its divisors is an integer number (1264539127446).

Almost surely, 2^{21221012022110} is an apocalyptic number.

21221012022110 is a deficient number, since it is larger than the sum of its proper divisors (19244240056162).

21221012022110 is a wasteful number, since it uses less digits than its factorization.

21221012022110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63270868.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 21221012022110 its reverse (1122021012212), we get a palindrome (22343033034322).

The spelling of 21221012022110 in words is "twenty-one trillion, two hundred twenty-one billion, twelve million, twenty-two thousand, one hundred ten".