21111220112202 has 48 divisors (see below), whose sum is σ = 51247875867552. Its totient is φ = 6224438360160.

The previous prime is 21111220112201. The next prime is 21111220112233. The reversal of 21111220112202 is 20221102211112.

21111220112202 is a `hidden beast` number, since 21 + 111 + 220 + 112 + 202 = 666.

It is a super-2 number, since 2×21111220112202² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (21111220112201) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1440834888 + ... + 1440849539.

It is an arithmetic number, because the mean of its divisors is an integer number (1067664080574).

Almost surely, 2^{21111220112202} is an apocalyptic number.

21111220112202 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21111220112202 is an abundant number, since it is smaller than the sum of its proper divisors (30136655755350).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21111220112202 is a wasteful number, since it uses less digits than its factorization.

21111220112202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2881684483 (or 2881684480 counting only the distinct ones).

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

Adding to 21111220112202 its reverse (20221102211112), we get a palindrome (41332322323314).

The spelling of 21111220112202 in words is "twenty-one trillion, one hundred eleven billion, two hundred twenty million, one hundred twelve thousand, two hundred two".