21113215040346 has 64 divisors (see below), whose sum is σ = 49619041637760. Its totient is φ = 5904560067840.

The previous prime is 21113215040299. The next prime is 21113215040399. The reversal of 21113215040346 is 64304051231112.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1539796 + ... + 6678128.

It is an arithmetic number, because the mean of its divisors is an integer number (775297525590).

Almost surely, 2^{21113215040346} is an apocalyptic number.

21113215040346 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

21113215040346 is an abundant number, since it is smaller than the sum of its proper divisors (28505826597414).

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

21113215040346 is a wasteful number, since it uses less digits than its factorization.

21113215040346 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5143151.

The product of its (nonzero) digits is 17280, while the sum is 33.

Adding to 21113215040346 its reverse (64304051231112), we get a palindrome (85417266271458).

The spelling of 21113215040346 in words is "twenty-one trillion, one hundred thirteen billion, two hundred fifteen million, forty thousand, three hundred forty-six".