21101434151 has 16 divisors (see below), whose sum is σ = 24796411200. Its totient is φ = 17582842368.

The previous prime is 21101434139. The next prime is 21101434177. The reversal of 21101434151 is 15143410112.

It is not a de Polignac number, because 21101434151 - 2²² = 21097239847 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21101434121) 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, 220466 + ... + 301343.

It is an arithmetic number, because the mean of its divisors is an integer number (1549775700).

Almost surely, 2^21101434151 is an apocalyptic number.

21101434151 is a deficient number, since it is larger than the sum of its proper divisors (3694977049).

21101434151 is a wasteful number, since it uses less digits than its factorization.

21101434151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 521978.

The product of its (nonzero) digits is 480, while the sum is 23.

Adding to 21101434151 its reverse (15143410112), we get a palindrome (36244844263).

The spelling of 21101434151 in words is "twenty-one billion, one hundred one million, four hundred thirty-four thousand, one hundred fifty-one".