21020012120110 has 8 divisors (see below), whose sum is σ = 37836021816216. Its totient is φ = 8408004848040.

The previous prime is 21020012120099. The next prime is 21020012120231. The reversal of 21020012120110 is 1102121002012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1051000605996 + ... + 1051000606015.

It is an arithmetic number, because the mean of its divisors is an integer number (4729502727027).

Almost surely, 2^{21020012120110} is an apocalyptic number.

21020012120110 is a deficient number, since it is larger than the sum of its proper divisors (16816009696106).

21020012120110 is a wasteful number, since it uses less digits than its factorization.

21020012120110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2102001212018.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 21020012120110 its reverse (1102121002012), we get a palindrome (22122133122122).

The spelling of 21020012120110 in words is "twenty-one trillion, twenty billion, twelve million, one hundred twenty thousand, one hundred ten".