211010012020 has 24 divisors (see below), whose sum is σ = 443971567368. Its totient is φ = 84241996800.

The previous prime is 211010011991. The next prime is 211010012021. The reversal of 211010012020 is 20210010112.

It can be written as a sum of positive squares in 4 ways, for example, as 1937936484 + 209072075536 = 44022^2 + 457244^2 .

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 211010011988 and 211010012006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211010012021) 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, 10114821 + ... + 10135660.

It is an arithmetic number, because the mean of its divisors is an integer number (18498815307).

Almost surely, 2^211010012020 is an apocalyptic number.

211010012020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211010012020 is an abundant number, since it is smaller than the sum of its proper divisors (232961555348).

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

211010012020 is a wasteful number, since it uses less digits than its factorization.

211010012020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20251011 (or 20251009 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 211010012020 its reverse (20210010112), we get a palindrome (231220022132).

The spelling of 211010012020 in words is "two hundred eleven billion, ten million, twelve thousand, twenty".