21121110022203 has 24 divisors (see below), whose sum is σ = 30699014411520. Its totient is φ = 13992808288560.

The previous prime is 21121110022147. The next prime is 21121110022211. The reversal of 21121110022203 is 30222001112112.

It is not a de Polignac number, because 21121110022203 - 2⁶ = 21121110022139 is a prime.

It is a super-2 number, since 2×21121110022203² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21121110022603) 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, 1904151 + ... + 6772592.

It is an arithmetic number, because the mean of its divisors is an integer number (1279125600480).

Almost surely, 2^{21121110022203} is an apocalyptic number.

21121110022203 is a deficient number, since it is larger than the sum of its proper divisors (9577904389317).

21121110022203 is a wasteful number, since it uses less digits than its factorization.

21121110022203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8678439 (or 8678436 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 21121110022203 its reverse (30222001112112), we get a palindrome (51343111134315).

The spelling of 21121110022203 in words is "twenty-one trillion, one hundred twenty-one billion, one hundred ten million, twenty-two thousand, two hundred three".