21001012302 has 32 divisors (see below), whose sum is σ = 43493294880. Its totient is φ = 6752269440.

The previous prime is 21001012261. The next prime is 21001012309. The reversal of 21001012302 is 20321010012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21001012309) 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, 118548 + ... + 236760.

It is an arithmetic number, because the mean of its divisors is an integer number (1359165465).

Almost surely, 2^21001012302 is an apocalyptic number.

21001012302 is an abundant number, since it is smaller than the sum of its proper divisors (22492282578).

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

21001012302 is a wasteful number, since it uses less digits than its factorization.

21001012302 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119268.

The product of its (nonzero) digits is 24, while the sum is 12.

Adding to 21001012302 its reverse (20321010012), we get a palindrome (41322022314).

The spelling of 21001012302 in words is "twenty-one billion, one million, twelve thousand, three hundred two".