20021212110 has 32 divisors (see below), whose sum is σ = 48121934112. Its totient is φ = 5331098240.

The previous prime is 20021212073. The next prime is 20021212111. The reversal of 20021212110 is 1121212002.

It is a super-2 number, since 2×20021212110² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20021212111) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 472581 + ... + 513200.

It is an arithmetic number, because the mean of its divisors is an integer number (1503810441).

Almost surely, 2^20021212110 is an apocalyptic number.

20021212110 is an abundant number, since it is smaller than the sum of its proper divisors (28100722002).

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

20021212110 is a wasteful number, since it uses less digits than its factorization.

20021212110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 986468.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 20021212110 its reverse (1121212002), we get a palindrome (21142424112).

The spelling of 20021212110 in words is "twenty billion, twenty-one million, two hundred twelve thousand, one hundred ten".