210001012120020 has 192 divisors, whose sum is σ = 662163080527872. Its totient is φ = 49266112896000.

The previous prime is 210001012119973. The next prime is 210001012120049. The reversal of 210001012120020 is 20021210100012.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 210001012119978 and 210001012120005.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1748185560 + ... + 1748305680.

It is an arithmetic number, because the mean of its divisors is an integer number (3448766044416).

Almost surely, 2^{210001012120020} is an apocalyptic number.

210001012120020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

210001012120020 is an abundant number, since it is smaller than the sum of its proper divisors (452162068407852).

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

210001012120020 is a wasteful number, since it uses less digits than its factorization.

210001012120020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 205622 (or 205620 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 210001012120020 its reverse (20021210100012), we get a palindrome (230022222220032).

The spelling of 210001012120020 in words is "two hundred ten trillion, one billion, twelve million, one hundred twenty thousand, twenty".