1021123442115 has 256 divisors, whose sum is σ = 2141637120000. Its totient is φ = 452018257920.

The previous prime is 1021123442071. The next prime is 1021123442147. The reversal of 1021123442115 is 5112443211201.

1021123442115 is a `hidden beast` number, since 1 + 0 + 2 + 1 + 1 + 234 + 421 + 1 + 5 = 666.

It is not a de Polignac number, because 1021123442115 - 2¹² = 1021123438019 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 255 ways as a sum of consecutive naturals, for example, 1887473745 + ... + 1887474285.

It is an arithmetic number, because the mean of its divisors is an integer number (8365770000).

Almost surely, 2^{1021123442115} is an apocalyptic number.

1021123442115 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1021123442115 is an abundant number, since it is smaller than the sum of its proper divisors (1120513677885).

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

1021123442115 is a wasteful number, since it uses less digits than its factorization.

1021123442115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1067 (or 1061 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 27.

Adding to 1021123442115 its reverse (5112443211201), we get a palindrome (6133566653316).

The spelling of 1021123442115 in words is "one trillion, twenty-one billion, one hundred twenty-three million, four hundred forty-two thousand, one hundred fifteen".