1121202222021 has 20 divisors (see below), whose sum is σ = 1914151237152. Its totient is φ = 640686983688.

The previous prime is 1121202222013. The next prime is 1121202222067. The reversal of 1121202222021 is 1202222021211.

It is a happy number.

It is not a de Polignac number, because 1121202222021 - 2³ = 1121202222013 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1121202221985 and 1121202222003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121202223021) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 988713915 + ... + 988715048.

Almost surely, 2^{1121202222021} is an apocalyptic number.

It is an amenable number.

1121202222021 is a deficient number, since it is larger than the sum of its proper divisors (792949015131).

1121202222021 is an equidigital number, since it uses as much as digits as its factorization.

1121202222021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1977428982 (or 1977428973 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 1121202222021 its reverse (1202222021211), we get a palindrome (2323424243232).

The spelling of 1121202222021 in words is "one trillion, one hundred twenty-one billion, two hundred two million, two hundred twenty-two thousand, twenty-one".