10212121212220 has 12 divisors (see below), whose sum is σ = 21445454545704. Its totient is φ = 4084848484880.

The previous prime is 10212121212187. The next prime is 10212121212281. The reversal of 10212121212220 is 2221212121201.

It is a congruent number.

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, 255303030286 + ... + 255303030325.

It is an arithmetic number, because the mean of its divisors is an integer number (1787121212142).

Almost surely, 2^{10212121212220} is an apocalyptic number.

10212121212220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10212121212220 is an abundant number, since it is smaller than the sum of its proper divisors (11233333333484).

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

10212121212220 is a wasteful number, since it uses less digits than its factorization.

10212121212220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 510606060620 (or 510606060618 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 10212121212220 its reverse (2221212121201), we get a palindrome (12433333333421).

The spelling of 10212121212220 in words is "ten trillion, two hundred twelve billion, one hundred twenty-one million, two hundred twelve thousand, two hundred twenty".