1011512512021 has 8 divisors (see below), whose sum is σ = 1103651841888. Its totient is φ = 919403790000.

The previous prime is 1011512512019. The next prime is 1011512512097. The reversal of 1011512512021 is 1202152151101.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1011512512021 - 2¹ = 1011512512019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1011512511983 and 1011512512001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1011512542021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7582830 + ... + 7715071.

It is an arithmetic number, because the mean of its divisors is an integer number (137956480236).

Almost surely, 2^{1011512512021} is an apocalyptic number.

1011512512021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1011512512021 is a deficient number, since it is larger than the sum of its proper divisors (92139329867).

1011512512021 is a wasteful number, since it uses less digits than its factorization.

1011512512021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15303923.

The product of its (nonzero) digits is 200, while the sum is 22.

Adding to 1011512512021 its reverse (1202152151101), we get a palindrome (2213664663122).

The spelling of 1011512512021 in words is "one trillion, eleven billion, five hundred twelve million, five hundred twelve thousand, twenty-one".