21021212313010 has 32 divisors (see below), whose sum is σ = 46570070356992. Its totient is φ = 6652867193280.

The previous prime is 21021212312983. The next prime is 21021212313019. The reversal of 21021212313010 is 1031321212012.

It is not an unprimeable number, because it can be changed into a prime (21021212313019) 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, 11550115746 + ... + 11550117565.

It is an arithmetic number, because the mean of its divisors is an integer number (1455314698656).

Almost surely, 2^{21021212313010} is an apocalyptic number.

21021212313010 is an abundant number, since it is smaller than the sum of its proper divisors (25548858043982).

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

21021212313010 is a wasteful number, since it uses less digits than its factorization.

21021212313010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23100233338.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 21021212313010 its reverse (1031321212012), we get a palindrome (22052533525022).

The spelling of 21021212313010 in words is "twenty-one trillion, twenty-one billion, two hundred twelve million, three hundred thirteen thousand, ten".