1021152452520 has 64 divisors (see below), whose sum is σ = 3063612755520. Its totient is φ = 272293507584.

The previous prime is 1021152452443. The next prime is 1021152452581. The reversal of 1021152452520 is 252542511201.

It is a super-2 number, since 2×1021152452520² (a number of 25 digits) contains 22 as substring.

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, 2279364 + ... + 2690316.

It is an arithmetic number, because the mean of its divisors is an integer number (47868949305).

Almost surely, 2^{1021152452520} is an apocalyptic number.

1021152452520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1021152452520 is an abundant number, since it is smaller than the sum of its proper divisors (2042460303000).

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

1021152452520 is a wasteful number, since it uses less digits than its factorization.

1021152452520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 431674 (or 431670 counting only the distinct ones).

The product of its (nonzero) digits is 8000, while the sum is 30.

Adding to 1021152452520 its reverse (252542511201), we get a palindrome (1273694963721).

The spelling of 1021152452520 in words is "one trillion, twenty-one billion, one hundred fifty-two million, four hundred fifty-two thousand, five hundred twenty".