202012120111221 has 96 divisors (see below), whose sum is σ = 372950971910400. Its totient is φ = 102735157109760.

The previous prime is 202012120111211. The next prime is 202012120111229. The reversal of 202012120111221 is 122111021210202.

202012120111221 is a `hidden beast` number, since 20 + 201 + 21 + 201 + 1 + 1 + 221 = 666.

It is not a de Polignac number, because 202012120111221 - 2¹⁷ = 202012119980149 is a prime.

It is a super-2 number, since 2×202012120111221² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 202012120111194 and 202012120111203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202012120111229) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 77357440 + ... + 79926201.

It is an arithmetic number, because the mean of its divisors is an integer number (3884905957400).

Almost surely, 2^{202012120111221} is an apocalyptic number.

202012120111221 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

202012120111221 is a deficient number, since it is larger than the sum of its proper divisors (170938851799179).

202012120111221 is a wasteful number, since it uses less digits than its factorization.

202012120111221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157283739 (or 157283736 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 202012120111221 its reverse (122111021210202), we get a palindrome (324123141321423).

The spelling of 202012120111221 in words is "two hundred two trillion, twelve billion, one hundred twenty million, one hundred eleven thousand, two hundred twenty-one".