102021210212220 has 72 divisors (see below), whose sum is σ = 333269286700896. Its totient is φ = 25112913282432.

The previous prime is 102021210212219. The next prime is 102021210212309. The reversal of 102021210212220 is 22212012120201.

It is a happy number.

102021210212220 is a `hidden beast` number, since 1 + 0 + 2 + 0 + 21 + 210 + 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 = 102021210212193 and 102021210212202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 21799401552 + ... + 21799406231.

It is an arithmetic number, because the mean of its divisors is an integer number (4628740093068).

Almost surely, 2^{102021210212220} is an apocalyptic number.

102021210212220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

102021210212220 is an abundant number, since it is smaller than the sum of its proper divisors (231248076488676).

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

102021210212220 is a wasteful number, since it uses less digits than its factorization.

102021210212220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43598807811 (or 43598807806 counting only the distinct ones).

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

Adding to 102021210212220 its reverse (22212012120201), we get a palindrome (124233222332421).

The spelling of 102021210212220 in words is "one hundred two trillion, twenty-one billion, two hundred ten million, two hundred twelve thousand, two hundred twenty".