21113412102 has 32 divisors (see below), whose sum is σ = 47125411200. Its totient is φ = 7006796424.

The previous prime is 21113412101. The next prime is 21113412107. The reversal of 21113412102 is 20121431112.

21113412102 is a `hidden beast` number, since 2 + 111 + 341 + 210 + 2 = 666.

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 (21113412101) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 848952 + ... + 873467.

It is an arithmetic number, because the mean of its divisors is an integer number (1472669100).

Almost surely, 2^21113412102 is an apocalyptic number.

21113412102 is an abundant number, since it is smaller than the sum of its proper divisors (26011999098).

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

21113412102 is a wasteful number, since it uses less digits than its factorization.

21113412102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1722657 (or 1722651 counting only the distinct ones).

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

Adding to 21113412102 its reverse (20121431112), we get a palindrome (41234843214).

The spelling of 21113412102 in words is "twenty-one billion, one hundred thirteen million, four hundred twelve thousand, one hundred two".