201212001020 has 48 divisors (see below), whose sum is σ = 447670450080. Its totient is φ = 75704745984.

The previous prime is 201212001007. The next prime is 201212001031. The reversal of 201212001020 is 20100212102.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 201212000992 and 201212001010.

It is a congruent number.

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, 389276 + ... + 744284.

It is an arithmetic number, because the mean of its divisors is an integer number (9326467710).

Almost surely, 2^201212001020 is an apocalyptic number.

201212001020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

201212001020 is an abundant number, since it is smaller than the sum of its proper divisors (246458449060).

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

201212001020 is a wasteful number, since it uses less digits than its factorization.

201212001020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 356702 (or 356700 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 201212001020 its reverse (20100212102), we get a palindrome (221312213122).

The spelling of 201212001020 in words is "two hundred one billion, two hundred twelve million, one thousand, twenty".