21101121122202 has 48 divisors (see below), whose sum is σ = 51541765107840. Its totient is φ = 6394279125960.

The previous prime is 21101121122189. The next prime is 21101121122243. The reversal of 21101121122202 is 20222112110112.

It is a super-2 number, since 2×21101121122202² (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 an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1614710418 + ... + 1614723485.

It is an arithmetic number, because the mean of its divisors is an integer number (1073786773080).

Almost surely, 2^{21101121122202} is an apocalyptic number.

21101121122202 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21101121122202 is an abundant number, since it is smaller than the sum of its proper divisors (30440643985638).

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

21101121122202 is a wasteful number, since it uses less digits than its factorization.

21101121122202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3229433936 (or 3229433919 counting only the distinct ones).

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

Adding to 21101121122202 its reverse (20222112110112), we get a palindrome (41323233232314).

The spelling of 21101121122202 in words is "twenty-one trillion, one hundred one billion, one hundred twenty-one million, one hundred twenty-two thousand, two hundred two".