21002012322 has 32 divisors (see below), whose sum is σ = 42930819072. Its totient is φ = 6846435024.

The previous prime is 21002012321. The next prime is 21002012329. The reversal of 21002012322 is 22321020012.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (21002012321) 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, 346153 + ... + 402275.

It is an arithmetic number, because the mean of its divisors is an integer number (1341588096).

Almost surely, 2^21002012322 is an apocalyptic number.

21002012322 is an abundant number, since it is smaller than the sum of its proper divisors (21928806750).

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

21002012322 is a wasteful number, since it uses less digits than its factorization.

21002012322 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57502.

The product of its (nonzero) digits is 96, while the sum is 15.

Adding to 21002012322 its reverse (22321020012), we get a palindrome (43323032334).

The spelling of 21002012322 in words is "twenty-one billion, two million, twelve thousand, three hundred twenty-two".