21121221022202 has 32 divisors (see below), whose sum is σ = 36440254764288. Its totient is φ = 8994017488896.

The previous prime is 21121221022177. The next prime is 21121221022211. The reversal of 21121221022202 is 20222012212112.

It is a super-2 number, since 2×21121221022202² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5964878 + ... + 8821689.

It is an arithmetic number, because the mean of its divisors is an integer number (1138757961384).

Almost surely, 2^{21121221022202} is an apocalyptic number.

21121221022202 is a deficient number, since it is larger than the sum of its proper divisors (15319033742086).

21121221022202 is a wasteful number, since it uses less digits than its factorization.

21121221022202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14787230.

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 21121221022202 its reverse (20222012212112), we get a palindrome (41343233234314).

The spelling of 21121221022202 in words is "twenty-one trillion, one hundred twenty-one billion, two hundred twenty-one million, twenty-two thousand, two hundred two".