20021021212010 has 32 divisors (see below), whose sum is σ = 44354262379392. Its totient is φ = 6336323196480.

The previous prime is 20021021211991. The next prime is 20021021212069. The reversal of 20021021212010 is 1021212012002.

It is a Harshad number since it is a multiple of its sum of digits (14).

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, 11000560196 + ... + 11000562015.

It is an arithmetic number, because the mean of its divisors is an integer number (1386070699356).

Almost surely, 2^{20021021212010} is an apocalyptic number.

20021021212010 is an abundant number, since it is smaller than the sum of its proper divisors (24333241167382).

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

20021021212010 is a wasteful number, since it uses less digits than its factorization.

20021021212010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22001122238.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 20021021212010 its reverse (1021212012002), we get a palindrome (21042233224012).

The spelling of 20021021212010 in words is "twenty trillion, twenty-one billion, twenty-one million, two hundred twelve thousand, ten".