21011112112210 has 64 divisors (see below), whose sum is σ = 42012895719168. Its totient is φ = 7501536000000.

The previous prime is 21011112112183. The next prime is 21011112112267. The reversal of 21011112112210 is 1221121111012.

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, 3699291 + ... + 7463710.

It is an arithmetic number, because the mean of its divisors is an integer number (656451495612).

Almost surely, 2^{21011112112210} is an apocalyptic number.

21011112112210 is a deficient number, since it is larger than the sum of its proper divisors (21001783606958).

21011112112210 is a wasteful number, since it uses less digits than its factorization.

21011112112210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11163331.

The product of its (nonzero) digits is 16, while the sum is 16.

Adding to 21011112112210 its reverse (1221121111012), we get a palindrome (22232233223222).

It can be divided in two parts, 210111 and 12112210, that added together give a palindrome (12322321).

The spelling of 21011112112210 in words is "twenty-one trillion, eleven billion, one hundred twelve million, one hundred twelve thousand, two hundred ten".