21112104133153 has 16 divisors (see below), whose sum is σ = 23052559718592. Its totient is φ = 19175180472000.

The previous prime is 21112104133139. The next prime is 21112104133193. The reversal of 21112104133153 is 35133140121112.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 21112104133153 - 2²¹ = 21112102036001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21112104133193) 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, 152187643 + ... + 152326303.

It is an arithmetic number, because the mean of its divisors is an integer number (1440784982412).

Almost surely, 2^{21112104133153} is an apocalyptic number.

It is an amenable number.

21112104133153 is a deficient number, since it is larger than the sum of its proper divisors (1940455585439).

21112104133153 is a wasteful number, since it uses less digits than its factorization.

21112104133153 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151296.

The product of its (nonzero) digits is 2160, while the sum is 28.

Adding to 21112104133153 its reverse (35133140121112), we get a palindrome (56245244254265).

The spelling of 21112104133153 in words is "twenty-one trillion, one hundred twelve billion, one hundred four million, one hundred thirty-three thousand, one hundred fifty-three".