212002120020 has 48 divisors (see below), whose sum is σ = 593845999488. Its totient is φ = 56511035520.

The previous prime is 212002120019. The next prime is 212002120021. The reversal of 212002120020 is 20021200212.

It is an interprime number because it is at equal distance from previous prime (212002120019) and next prime (212002120021).

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 = 212002119978 and 212002120005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212002120021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 564616 + ... + 861855.

It is an arithmetic number, because the mean of its divisors is an integer number (12371791656).

Almost surely, 2^212002120020 is an apocalyptic number.

212002120020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212002120020 is an abundant number, since it is smaller than the sum of its proper divisors (381843879468).

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

212002120020 is a wasteful number, since it uses less digits than its factorization.

212002120020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1428960 (or 1428958 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

Adding to 212002120020 its reverse (20021200212), we get a palindrome (232023320232).

The spelling of 212002120020 in words is "two hundred twelve billion, two million, one hundred twenty thousand, twenty".