213012020111020 has 384 divisors, whose sum is σ = 544467957497856. Its totient is φ = 69185144438784.

The previous prime is 213012020110999. The next prime is 213012020111041. The reversal of 213012020111020 is 20111020210312.

It is an interprime number because it is at equal distance from previous prime (213012020110999) and next prime (213012020111041).

It is a junction number, because it is equal to n+sod(n) for n = 213012020110985 and 213012020111003.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 2928889897 + ... + 2928962623.

It is an arithmetic number, because the mean of its divisors is an integer number (1417885305984).

Almost surely, 2^{213012020111020} is an apocalyptic number.

213012020111020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 213012020111020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (272233978748928).

213012020111020 is an abundant number, since it is smaller than the sum of its proper divisors (331455937386836).

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

213012020111020 is a wasteful number, since it uses less digits than its factorization.

213012020111020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73449 (or 73447 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 213012020111020 its reverse (20111020210312), we get a palindrome (233123040321332).

The spelling of 213012020111020 in words is "two hundred thirteen trillion, twelve billion, twenty million, one hundred eleven thousand, twenty".