21221012101122 has 96 divisors (see below), whose sum is σ = 46692512290944. Its totient is φ = 6964167974400.

The previous prime is 21221012101111. The next prime is 21221012101129. The reversal of 21221012101122 is 22110121012212.

21221012101122 is a `hidden beast` number, since 212 + 210 + 1 + 210 + 11 + 22 = 666.

It is a super-2 number, since 2×21221012101122² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 21221012101095 and 21221012101104.

It is not an unprimeable number, because it can be changed into a prime (21221012101129) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4006229578 + ... + 4006234874.

It is an arithmetic number, because the mean of its divisors is an integer number (486380336364).

Almost surely, 2^{21221012101122} is an apocalyptic number.

21221012101122 is an abundant number, since it is smaller than the sum of its proper divisors (25471500189822).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21221012101122 is a wasteful number, since it uses less digits than its factorization.

21221012101122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9224 (or 9221 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 21221012101122 its reverse (22110121012212), we get a palindrome (43331133113334).

The spelling of 21221012101122 in words is "twenty-one trillion, two hundred twenty-one billion, twelve million, one hundred one thousand, one hundred twenty-two".