21202123311110 has 64 divisors (see below), whose sum is σ = 43858339799040. Its totient is φ = 7228900183680.

The previous prime is 21202123311097. The next prime is 21202123311133. The reversal of 21202123311110 is 1111332120212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 41312297 + ... + 41822363.

It is an arithmetic number, because the mean of its divisors is an integer number (685286559360).

Almost surely, 2^{21202123311110} is an apocalyptic number.

21202123311110 is an abundant number, since it is smaller than the sum of its proper divisors (22656216487930).

21202123311110 is a wasteful number, since it uses less digits than its factorization.

21202123311110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 513381.

The product of its (nonzero) digits is 144, while the sum is 20.

Adding to 21202123311110 its reverse (1111332120212), we get a palindrome (22313455431322).

The spelling of 21202123311110 in words is "twenty-one trillion, two hundred two billion, one hundred twenty-three million, three hundred eleven thousand, one hundred ten".