212123103210020 has 12 divisors (see below), whose sum is σ = 445458516741084. Its totient is φ = 84849241284000.

The previous prime is 212123103209977. The next prime is 212123103210049. The reversal of 212123103210020 is 20012301321212.

It can be written as a sum of positive squares in 2 ways, for example, as 74183527836196 + 137939575373824 = 8612986^2 + 11744768^2 .

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 10606155160501 = 212123103210020 / (2 + 1 + 2 + 1 + 2 + 3 + 1 + 0 + 3 + 2 + 1 + 0 + 0 + 2 + 0).

It is a junction number, because it is equal to n+sod(n) for n = 212123103209974 and 212123103210001.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5303077580231 + ... + 5303077580270.

It is an arithmetic number, because the mean of its divisors is an integer number (37121543061757).

Almost surely, 2^{212123103210020} is an apocalyptic number.

212123103210020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212123103210020 is an abundant number, since it is smaller than the sum of its proper divisors (233335413531064).

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

212123103210020 is a wasteful number, since it uses less digits than its factorization.

212123103210020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10606155160510 (or 10606155160508 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 212123103210020 its reverse (20012301321212), we get a palindrome (232135404531232).

The spelling of 212123103210020 in words is "two hundred twelve trillion, one hundred twenty-three billion, one hundred three million, two hundred ten thousand, twenty".