20212021210 has 32 divisors (see below), whose sum is σ = 38924294400. Its totient is φ = 7533725760.

The previous prime is 20212021199. The next prime is 20212021211. The reversal of 20212021210 is 1212021202.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (20212021211) 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, 860370 + ... + 883549.

It is an arithmetic number, because the mean of its divisors is an integer number (1216384200).

Almost surely, 2^20212021210 is an apocalyptic number.

20212021210 is a deficient number, since it is larger than the sum of its proper divisors (18712273190).

20212021210 is a wasteful number, since it uses less digits than its factorization.

20212021210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1744006.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 20212021210 its reverse (1212021202), we get a palindrome (21424042412).

The spelling of 20212021210 in words is "twenty billion, two hundred twelve million, twenty-one thousand, two hundred ten".