1021153125312 has 168 divisors, whose sum is σ = 2966480874240. Its totient is φ = 335794567680.

The previous prime is 1021153125301. The next prime is 1021153125319. The reversal of 1021153125312 is 2135213511201.

1021153125312 is a `hidden beast` number, since 1 + 0 + 2 + 115 + 3 + 12 + 531 + 2 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021153125319) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 58372887 + ... + 58390377.

Almost surely, 2^{1021153125312} is an apocalyptic number.

1021153125312 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1021153125312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1483240437120).

1021153125312 is an abundant number, since it is smaller than the sum of its proper divisors (1945327748928).

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

1021153125312 is a wasteful number, since it uses less digits than its factorization.

1021153125312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18871 (or 18858 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 27.

Adding to 1021153125312 its reverse (2135213511201), we get a palindrome (3156366636513).

The spelling of 1021153125312 in words is "one trillion, twenty-one billion, one hundred fifty-three million, one hundred twenty-five thousand, three hundred twelve".