21121032301 has 4 divisors (see below), whose sum is σ = 22232665600. Its totient is φ = 20009399004.

The previous prime is 21121032299. The next prime is 21121032329. The reversal of 21121032301 is 10323012112.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21121032301 - 2¹ = 21121032299 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 (21121036301) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 555816621 + ... + 555816658.

It is an arithmetic number, because the mean of its divisors is an integer number (5558166400).

Almost surely, 2^21121032301 is an apocalyptic number.

It is an amenable number.

21121032301 is a deficient number, since it is larger than the sum of its proper divisors (1111633299).

21121032301 is a wasteful number, since it uses less digits than its factorization.

21121032301 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1111633298.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 21121032301 its reverse (10323012112), we get a palindrome (31444044413).

The spelling of 21121032301 in words is "twenty-one billion, one hundred twenty-one million, thirty-two thousand, three hundred one".