20201121210 has 64 divisors (see below), whose sum is σ = 49063449600. Its totient is φ = 5322527232.

The previous prime is 20201121167. The next prime is 20201121229. The reversal of 20201121210 is 1212110202.

It is a super-2 number, since 2×20201121210² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6377047 + ... + 6380213.

It is an arithmetic number, because the mean of its divisors is an integer number (766616400).

Almost surely, 2^20201121210 is an apocalyptic number.

20201121210 is an abundant number, since it is smaller than the sum of its proper divisors (28862328390).

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

20201121210 is a wasteful number, since it uses less digits than its factorization.

20201121210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5655.

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

Adding to 20201121210 its reverse (1212110202), we get a palindrome (21413231412).

The spelling of 20201121210 in words is "twenty billion, two hundred one million, one hundred twenty-one thousand, two hundred ten".