21012202022103 has 12 divisors (see below), whose sum is σ = 31670565366960. Its totient is φ = 13399085347296.

The previous prime is 21012202022047. The next prime is 21012202022107. The reversal of 21012202022103 is 30122020221012.

21012202022103 is a `hidden beast` number, since 210 + 1 + 220 + 20 + 2 + 210 + 3 = 666.

It is not a de Polignac number, because 21012202022103 - 2¹² = 21012202018007 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21012202022107) 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, 50754110958 + ... + 50754111371.

It is an arithmetic number, because the mean of its divisors is an integer number (2639213780580).

Almost surely, 2^{21012202022103} is an apocalyptic number.

21012202022103 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

21012202022103 is a deficient number, since it is larger than the sum of its proper divisors (10658363344857).

21012202022103 is a wasteful number, since it uses less digits than its factorization.

21012202022103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101508222358 (or 101508222355 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 21012202022103 its reverse (30122020221012), we get a palindrome (51134222243115).

The spelling of 21012202022103 in words is "twenty-one trillion, twelve billion, two hundred two million, twenty-two thousand, one hundred three".