1020233231220 has 96 divisors (see below), whose sum is σ = 3313473988608. Its totient is φ = 229715620992.

The previous prime is 1020233231197. The next prime is 1020233231257. The reversal of 1020233231220 is 221323320201.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 18099672 + ... + 18155951.

It is an arithmetic number, because the mean of its divisors is an integer number (34515354048).

Almost surely, 2^{1020233231220} is an apocalyptic number.

1020233231220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1020233231220 is an abundant number, since it is smaller than the sum of its proper divisors (2293240757388).

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

1020233231220 is a wasteful number, since it uses less digits than its factorization.

1020233231220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36255709 (or 36255707 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 21.

Adding to 1020233231220 its reverse (221323320201), we get a palindrome (1241556551421).

The spelling of 1020233231220 in words is "one trillion, twenty billion, two hundred thirty-three million, two hundred thirty-one thousand, two hundred twenty".