10122222120021 has 24 divisors (see below), whose sum is σ = 15977340628704. Its totient is φ = 6124229134560.

The previous prime is 10122222119957. The next prime is 10122222120029. The reversal of 10122222120021 is 12002122222101.

It is a happy number.

10122222120021 is a `hidden beast` number, since 1 + 0 + 1 + 222 + 221 + 200 + 21 = 666.

It is not a de Polignac number, because 10122222120021 - 2⁶ = 10122222119957 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 10122222119976 and 10122222120003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10122222120029) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 87032746 + ... + 87148971.

It is an arithmetic number, because the mean of its divisors is an integer number (665722526196).

Almost surely, 2^{10122222120021} is an apocalyptic number.

10122222120021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

10122222120021 is a deficient number, since it is larger than the sum of its proper divisors (5855118508683).

10122222120021 is a wasteful number, since it uses less digits than its factorization.

10122222120021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174182321 (or 174182318 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 10122222120021 its reverse (12002122222101), we get a palindrome (22124344342122).

The spelling of 10122222120021 in words is "ten trillion, one hundred twenty-two billion, two hundred twenty-two million, one hundred twenty thousand, twenty-one".