21021231131110 has 32 divisors (see below), whose sum is σ = 43319674981440. Its totient is φ = 7194612659712.

The previous prime is 21021231131083. The next prime is 21021231131119. The reversal of 21021231131110 is 1113113212012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21021231131119) 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, 263847079 + ... + 263926738.

It is an arithmetic number, because the mean of its divisors is an integer number (1353739843170).

Almost surely, 2^{21021231131110} is an apocalyptic number.

21021231131110 is an abundant number, since it is smaller than the sum of its proper divisors (22298443850330).

21021231131110 is a wasteful number, since it uses less digits than its factorization.

21021231131110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 527774400.

The product of its (nonzero) digits is 72, while the sum is 19.

Adding to 21021231131110 its reverse (1113113212012), we get a palindrome (22134344343122).

The spelling of 21021231131110 in words is "twenty-one trillion, twenty-one billion, two hundred thirty-one million, one hundred thirty-one thousand, one hundred ten".