213021021001020 has 144 divisors (see below), whose sum is σ = 598920365070720. Its totient is φ = 56572008641792.

The previous prime is 213021021000989. The next prime is 213021021001031. The reversal of 213021021001020 is 20100120120312.

213021021001020 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5983214539 + ... + 5983250141.

It is an arithmetic number, because the mean of its divisors is an integer number (4159169201880).

Almost surely, 2^{213021021001020} is an apocalyptic number.

213021021001020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

213021021001020 is an abundant number, since it is smaller than the sum of its proper divisors (385899344069700).

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

213021021001020 is a wasteful number, since it uses less digits than its factorization.

213021021001020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37052 (or 36661 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 213021021001020 its reverse (20100120120312), we get a palindrome (233121141121332).

The spelling of 213021021001020 in words is "two hundred thirteen trillion, twenty-one billion, twenty-one million, one thousand, twenty".