21122020001121 has 16 divisors (see below), whose sum is σ = 30416457994944. Its totient is φ = 12960707454144.

The previous prime is 21122020001087. The next prime is 21122020001129. The reversal of 21122020001121 is 12110002022112.

It is not a de Polignac number, because 21122020001121 - 2⁶ = 21122020001057 is a prime.

It is a super-2 number, since 2×21122020001121² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21122020001121.

It is not an unprimeable number, because it can be changed into a prime (21122020001129) 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, 780375886 + ... + 780402951.

It is an arithmetic number, because the mean of its divisors is an integer number (1901028624684).

Almost surely, 2^{21122020001121} is an apocalyptic number.

It is an amenable number.

21122020001121 is a deficient number, since it is larger than the sum of its proper divisors (9294437993823).

21122020001121 is a wasteful number, since it uses less digits than its factorization.

21122020001121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1560779200.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 21122020001121 its reverse (12110002022112), we get a palindrome (33232022023233).

The spelling of 21122020001121 in words is "twenty-one trillion, one hundred twenty-two billion, twenty million, one thousand, one hundred twenty-one".