201212211020 has 12 divisors (see below), whose sum is σ = 422545643184. Its totient is φ = 80484884400.

The previous prime is 201212211019. The next prime is 201212211061. The reversal of 201212211020 is 20112212102.

It is a junction number, because it is equal to n+sod(n) for n = 201212210986 and 201212211004.

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, 5030305256 + ... + 5030305295.

It is an arithmetic number, because the mean of its divisors is an integer number (35212136932).

Almost surely, 2^201212211020 is an apocalyptic number.

201212211020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

201212211020 is an abundant number, since it is smaller than the sum of its proper divisors (221333432164).

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

201212211020 is a wasteful number, since it uses less digits than its factorization.

201212211020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10060610560 (or 10060610558 counting only the distinct ones).

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

Adding to 201212211020 its reverse (20112212102), we get a palindrome (221324423122).

The spelling of 201212211020 in words is "two hundred one billion, two hundred twelve million, two hundred eleven thousand, twenty".