201211013020 has 24 divisors (see below), whose sum is σ = 423275462064. Its totient is φ = 80344912896.

The previous prime is 201211012993. The next prime is 201211013021. The reversal of 201211013020 is 20310112102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201211013021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8706442 + ... + 8729521.

It is an arithmetic number, because the mean of its divisors is an integer number (17636477586).

Almost surely, 2^201211013020 is an apocalyptic number.

201211013020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

201211013020 is an abundant number, since it is smaller than the sum of its proper divisors (222064449044).

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

201211013020 is a wasteful number, since it uses less digits than its factorization.

201211013020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17436549 (or 17436547 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 201211013020 its reverse (20310112102), we get a palindrome (221521125122).

The spelling of 201211013020 in words is "two hundred one billion, two hundred eleven million, thirteen thousand, twenty".