20213120030121 has 12 divisors (see below), whose sum is σ = 29382695360772. Its totient is φ = 13389582694176.

The previous prime is 20213120030069. The next prime is 20213120030161. The reversal of 20213120030121 is 12103002131202.

20213120030121 is a `hidden beast` number, since 202 + 1 + 312 + 0 + 0 + 30 + 121 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 4008985040025 + 16204134990096 = 2002245^2 + 4025436^2 .

It is not a de Polignac number, because 20213120030121 - 2⁶ = 20213120030057 is a prime.

It is a super-3 number, since 3×20213120030121³ (a number of 41 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20213120030094 and 20213120030103.

It is not an unprimeable number, because it can be changed into a prime (20213120030161) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7152553446 + ... + 7152556271.

It is an arithmetic number, because the mean of its divisors is an integer number (2448557946731).

Almost surely, 2^{20213120030121} is an apocalyptic number.

It is an amenable number.

20213120030121 is a deficient number, since it is larger than the sum of its proper divisors (9169575330651).

20213120030121 is a wasteful number, since it uses less digits than its factorization.

20213120030121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14305109880 (or 14305109877 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 20213120030121 its reverse (12103002131202), we get a palindrome (32316122161323).

The spelling of 20213120030121 in words is "twenty trillion, two hundred thirteen billion, one hundred twenty million, thirty thousand, one hundred twenty-one".