10212121980 has 60 divisors (see below), whose sum is σ = 32035809960. Its totient is φ = 2723232096.

The previous prime is 10212121961. The next prime is 10212121981. The reversal of 10212121980 is 8912121201.

It is a tau number, because it is divible by the number of its divisors (60).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10212121981) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 3150270 + ... + 3153509.

It is an arithmetic number, because the mean of its divisors is an integer number (533930166).

Almost surely, 2^10212121980 is an apocalyptic number.

10212121980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10212121980 is an abundant number, since it is smaller than the sum of its proper divisors (21823687980).

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

10212121980 is a wasteful number, since it uses less digits than its factorization.

10212121980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6303800 (or 6303789 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 27.

The spelling of 10212121980 in words is "ten billion, two hundred twelve million, one hundred twenty-one thousand, nine hundred eighty".