1000011111021 has 48 divisors (see below), whose sum is σ = 1566036763200. Its totient is φ = 614896203168.

The previous prime is 1000011111019. The next prime is 1000011111049. The reversal of 1000011111021 is 1201111100001.

It is not a de Polignac number, because 1000011111021 - 2¹ = 1000011111019 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 1000011110994 and 1000011111012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1000011111061) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 25349050 + ... + 25388468.

It is an arithmetic number, because the mean of its divisors is an integer number (32625765900).

Almost surely, 2^{1000011111021} is an apocalyptic number.

It is an amenable number.

1000011111021 is a deficient number, since it is larger than the sum of its proper divisors (566025652179).

1000011111021 is a wasteful number, since it uses less digits than its factorization.

1000011111021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40747 (or 40718 counting only the distinct ones).

The product of its (nonzero) digits is 2, while the sum is 9.

Adding to 1000011111021 its reverse (1201111100001), we get a palindrome (2201122211022).

The spelling of 1000011111021 in words is "one trillion, eleven million, one hundred eleven thousand, twenty-one".