21121202201112 has 48 divisors (see below), whose sum is σ = 61603506422640. Its totient is φ = 6498831446208.

The previous prime is 21121202201111. The next prime is 21121202201131. The reversal of 21121202201112 is 21110220212112.

21121202201112 is a `hidden beast` number, since 211 + 2 + 120 + 220 + 1 + 112 = 666.

It is a super-2 number, since 2×21121202201112² (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 a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21121202201111) 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, 11282692548 + ... + 11282694419.

It is an arithmetic number, because the mean of its divisors is an integer number (1283406383805).

Almost surely, 2^{21121202201112} is an apocalyptic number.

It is an amenable number.

21121202201112 is an abundant number, since it is smaller than the sum of its proper divisors (40482304221528).

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

21121202201112 is a wasteful number, since it uses less digits than its factorization.

21121202201112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22565386992 (or 22565386985 counting only the distinct ones).

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

Adding to 21121202201112 its reverse (21110220212112), we get a palindrome (42231422413224).

The spelling of 21121202201112 in words is "twenty-one trillion, one hundred twenty-one billion, two hundred two million, two hundred one thousand, one hundred twelve".