21110221202010 has 32 divisors (see below), whose sum is σ = 53331085143360. Its totient is φ = 5333108514048.

The previous prime is 21110221201999. The next prime is 21110221202033. The reversal of 21110221202010 is 1020212201112.

It is a Harshad number since it is a multiple of its sum of digits (15).

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, 18517737327 + ... + 18517738466.

It is an arithmetic number, because the mean of its divisors is an integer number (1666596410730).

Almost surely, 2^{21110221202010} is an apocalyptic number.

21110221202010 is an abundant number, since it is smaller than the sum of its proper divisors (32220863941350).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21110221202010 is a wasteful number, since it uses less digits than its factorization.

21110221202010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37035475822.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 21110221202010 its reverse (1020212201112), we get a palindrome (22130433403122).

The spelling of 21110221202010 in words is "twenty-one trillion, one hundred ten billion, two hundred twenty-one million, two hundred two thousand, ten".