121122100010021 has 16 divisors (see below), whose sum is σ = 134116958606400. Its totient is φ = 108458152682880.

The previous prime is 121122100009957. The next prime is 121122100010029. The reversal of 121122100010021 is 120010001221121.

It is not a de Polignac number, because 121122100010021 - 2⁶ = 121122100009957 is a prime.

It is a super-2 number, since 2×121122100010021² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 121122100009978 and 121122100010005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121122100010029) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1396505 + ... + 15626721.

It is an arithmetic number, because the mean of its divisors is an integer number (8382309912900).

Almost surely, 2^{121122100010021} is an apocalyptic number.

121122100010021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

121122100010021 is a deficient number, since it is larger than the sum of its proper divisors (12994858596379).

121122100010021 is a wasteful number, since it uses less digits than its factorization.

121122100010021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14241844.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 121122100010021 its reverse (120010001221121), we get a palindrome (241132101231142).

The spelling of 121122100010021 in words is "one hundred twenty-one trillion, one hundred twenty-two billion, one hundred million, ten thousand, twenty-one".