10202121212220 has 144 divisors (see below), whose sum is σ = 36586917581760. Its totient is φ = 2251502604288.

The previous prime is 10202121212183. The next prime is 10202121212263. The reversal of 10202121212220 is 2221212120201.

It is a happy number.

10202121212220 is a `hidden beast` number, since 1 + 0 + 20 + 212 + 1 + 212 + 220 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 10202121212193 and 10202121212202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 139565557 + ... + 139638636.

It is an arithmetic number, because the mean of its divisors is an integer number (254075816540).

Almost surely, 2^{10202121212220} is an apocalyptic number.

10202121212220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10202121212220 is an abundant number, since it is smaller than the sum of its proper divisors (26384796369540).

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

10202121212220 is a wasteful number, since it uses less digits than its factorization.

10202121212220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 279204244 (or 279204239 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 10202121212220 its reverse (2221212120201), we get a palindrome (12423333332421).

The spelling of 10202121212220 in words is "ten trillion, two hundred two billion, one hundred twenty-one million, two hundred twelve thousand, two hundred twenty".