1011120101021 has 4 divisors (see below), whose sum is σ = 1027695840444. Its totient is φ = 994544361600.

The previous prime is 1011120100973. The next prime is 1011120101027. The reversal of 1011120101021 is 1201010211101.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 52902300025 + 958217800996 = 230005^2 + 978886^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1011120101021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1011120100993 and 1011120101011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1011120101027) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8287869620 + ... + 8287869741.

It is an arithmetic number, because the mean of its divisors is an integer number (256923960111).

Almost surely, 2^{1011120101021} is an apocalyptic number.

It is an amenable number.

1011120101021 is a deficient number, since it is larger than the sum of its proper divisors (16575739423).

1011120101021 is an equidigital number, since it uses as much as digits as its factorization.

1011120101021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16575739422.

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 1011120101021 its reverse (1201010211101), we get a palindrome (2212130312122).

The spelling of 1011120101021 in words is "one trillion, eleven billion, one hundred twenty million, one hundred one thousand, twenty-one".