20021021110 has 8 divisors (see below), whose sum is σ = 36037838016. Its totient is φ = 8008408440.

The previous prime is 20021021093. The next prime is 20021021177. The reversal of 20021021110 is 1112012002.

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

It is a Harshad number since it is a multiple of its sum of digits (10), and also a Moran number because the ratio is a prime number: 2002102111 = 20021021110 / (2 + 0 + 0 + 2 + 1 + 0 + 2 + 1 + 1 + 1 + 0).

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, 1001051046 + ... + 1001051065.

It is an arithmetic number, because the mean of its divisors is an integer number (4504729752).

Almost surely, 2^20021021110 is an apocalyptic number.

20021021110 is a deficient number, since it is larger than the sum of its proper divisors (16016816906).

20021021110 is a wasteful number, since it uses less digits than its factorization.

20021021110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2002102118.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 20021021110 its reverse (1112012002), we get a palindrome (21133033112).

The spelling of 20021021110 in words is "twenty billion, twenty-one million, twenty-one thousand, one hundred ten".