1021232102220 has 72 divisors (see below), whose sum is σ = 3379349872080. Its totient is φ = 247571418240.

The previous prime is 1021232102207. The next prime is 1021232102279. The reversal of 1021232102220 is 222012321201.

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 = 1021232102193 and 1021232102202.

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, 257884915 + ... + 257888874.

It is an arithmetic number, because the mean of its divisors is an integer number (46935414890).

Almost surely, 2^{1021232102220} is an apocalyptic number.

1021232102220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1021232102220 is an abundant number, since it is smaller than the sum of its proper divisors (2358117769860).

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

1021232102220 is a wasteful number, since it uses less digits than its factorization.

1021232102220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 515773815 (or 515773810 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 1021232102220 its reverse (222012321201), we get a palindrome (1243244423421).

The spelling of 1021232102220 in words is "one trillion, twenty-one billion, two hundred thirty-two million, one hundred two thousand, two hundred twenty".