1021254154536 has 128 divisors (see below), whose sum is σ = 3243189196800. Its totient is φ = 260255873280.

The previous prime is 1021254154523. The next prime is 1021254154567. The reversal of 1021254154536 is 6354514521201.

It is a junction number, because it is equal to n+sod(n) for n = 1021254154494 and 1021254154503.

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, 5115516 + ... + 5311403.

It is an arithmetic number, because the mean of its divisors is an integer number (25337415600).

Almost surely, 2^{1021254154536} is an apocalyptic number.

It is an amenable number.

1021254154536 is an abundant number, since it is smaller than the sum of its proper divisors (2221935042264).

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

1021254154536 is a wasteful number, since it uses less digits than its factorization.

1021254154536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10426999 (or 10426995 counting only the distinct ones).

The product of its (nonzero) digits is 144000, while the sum is 39.

Adding to 1021254154536 its reverse (6354514521201), we get a palindrome (7375768675737).

The spelling of 1021254154536 in words is "one trillion, twenty-one billion, two hundred fifty-four million, one hundred fifty-four thousand, five hundred thirty-six".