21311032414042 has 24 divisors (see below), whose sum is σ = 37186382249280. Its totient is φ = 9133101817560.

The previous prime is 21311032414033. The next prime is 21311032414057. The reversal of 21311032414042 is 24041423011312.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 21311032414042.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2239317 + ... + 6901927.

It is an arithmetic number, because the mean of its divisors is an integer number (1549432593720).

Almost surely, 2^{21311032414042} is an apocalyptic number.

21311032414042 is a deficient number, since it is larger than the sum of its proper divisors (15875349835238).

21311032414042 is a wasteful number, since it uses less digits than its factorization.

21311032414042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4709266 (or 4709259 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 28.

Adding to 21311032414042 its reverse (24041423011312), we get a palindrome (45352455425354).

The spelling of 21311032414042 in words is "twenty-one trillion, three hundred eleven billion, thirty-two million, four hundred fourteen thousand, forty-two".