1011110021021 has 4 divisors (see below), whose sum is σ = 1043726473344. Its totient is φ = 978493568700.

The previous prime is 1011110020979. The next prime is 1011110021059. The reversal of 1011110021021 is 1201200111101.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1011110021021 - 2²⁶ = 1011042912157 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1011110020993 and 1011110021011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1011110021221) 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, 16308226115 + ... + 16308226176.

It is an arithmetic number, because the mean of its divisors is an integer number (260931618336).

Almost surely, 2^{1011110021021} is an apocalyptic number.

It is an amenable number.

1011110021021 is a deficient number, since it is larger than the sum of its proper divisors (32616452323).

1011110021021 is an equidigital number, since it uses as much as digits as its factorization.

1011110021021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32616452322.

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

Adding to 1011110021021 its reverse (1201200111101), we get a palindrome (2212310132122).

The spelling of 1011110021021 in words is "one trillion, eleven billion, one hundred ten million, twenty-one thousand, twenty-one".