21122010100121 has 8 divisors (see below), whose sum is σ = 24195448099584. Its totient is φ = 18062574096960.

The previous prime is 21122010100099. The next prime is 21122010100157. The reversal of 21122010100121 is 12100101022112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21122010100121 is a prime.

It is a super-2 number, since 2×21122010100121² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21122010100096 and 21122010100105.

It is not an unprimeable number, because it can be changed into a prime (21122010100021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3500495840 + ... + 3500501873.

It is an arithmetic number, because the mean of its divisors is an integer number (3024431012448).

Almost surely, 2^{21122010100121} is an apocalyptic number.

It is an amenable number.

21122010100121 is a deficient number, since it is larger than the sum of its proper divisors (3073437999463).

21122010100121 is an equidigital number, since it uses as much as digits as its factorization.

21122010100121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7000998151.

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

Adding to 21122010100121 its reverse (12100101022112), we get a palindrome (33222111122233).

The spelling of 21122010100121 in words is "twenty-one trillion, one hundred twenty-two billion, ten million, one hundred thousand, one hundred twenty-one".