1111012122021 has 16 divisors (see below), whose sum is σ = 1497435081024. Its totient is φ = 732670164864.

The previous prime is 1111012122007. The next prime is 1111012122023. The reversal of 1111012122021 is 1202212101111.

It is a happy number.

It is not a de Polignac number, because 1111012122021 - 2⁶ = 1111012121957 is a prime.

It is a super-4 number, since 4×1111012122021⁴ (a number of 49 digits) contains 4444 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1111012122023) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4659646 + ... + 4892271.

It is an arithmetic number, because the mean of its divisors is an integer number (93589692564).

Almost surely, 2^{1111012122021} is an apocalyptic number.

It is an amenable number.

1111012122021 is a deficient number, since it is larger than the sum of its proper divisors (386422959003).

1111012122021 is a wasteful number, since it uses less digits than its factorization.

1111012122021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9552340.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 1111012122021 its reverse (1202212101111), we get a palindrome (2313224223132).

The spelling of 1111012122021 in words is "one trillion, one hundred eleven billion, twelve million, one hundred twenty-two thousand, twenty-one".