1021232553420 has 48 divisors (see below), whose sum is σ = 2867936224608. Its totient is φ = 271520578560.

The previous prime is 1021232553391. The next prime is 1021232553433. The reversal of 1021232553420 is 243552321201.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25232811 + ... + 25273250.

It is an arithmetic number, because the mean of its divisors is an integer number (59748671346).

Almost surely, 2^{1021232553420} is an apocalyptic number.

1021232553420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1021232553420 is an abundant number, since it is smaller than the sum of its proper divisors (1846703671188).

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

1021232553420 is a wasteful number, since it uses less digits than its factorization.

1021232553420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50506410 (or 50506408 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 30.

Adding to 1021232553420 its reverse (243552321201), we get a palindrome (1264784874621).

The spelling of 1021232553420 in words is "one trillion, twenty-one billion, two hundred thirty-two million, five hundred fifty-three thousand, four hundred twenty".