21101212110110 has 32 divisors (see below), whose sum is σ = 42053541869952. Its totient is φ = 7558643141280.

The previous prime is 21101212110103. The next prime is 21101212110131. The reversal of 21101212110110 is 1101121210112.

It is a super-2 number, since 2×21101212110110² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1431553832 + ... + 1431568571.

It is an arithmetic number, because the mean of its divisors is an integer number (1314173183436).

Almost surely, 2^{21101212110110} is an apocalyptic number.

21101212110110 is a deficient number, since it is larger than the sum of its proper divisors (20952329759842).

21101212110110 is a wasteful number, since it uses less digits than its factorization.

21101212110110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2863122488.

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 21101212110110 its reverse (1101121210112), we get a palindrome (22202333320222).

The spelling of 21101212110110 in words is "twenty-one trillion, one hundred one billion, two hundred twelve million, one hundred ten thousand, one hundred ten".