1121222002021 has 16 divisors (see below), whose sum is σ = 1296336182400. Its totient is φ = 958419642880.

The previous prime is 1121222001961. The next prime is 1121222002037. The reversal of 1121222002021 is 1202002221211.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1121222002021 - 2²³ = 1121213613413 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1121222001986 and 1121222002004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121228002021) 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, 2661721 + ... + 3054046.

It is an arithmetic number, because the mean of its divisors is an integer number (81021011400).

Almost surely, 2^{1121222002021} is an apocalyptic number.

1121222002021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1121222002021 is a deficient number, since it is larger than the sum of its proper divisors (175114180379).

1121222002021 is a wasteful number, since it uses less digits than its factorization.

1121222002021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5716844.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 1121222002021 its reverse (1202002221211), we get a palindrome (2323224223232).

The spelling of 1121222002021 in words is "one trillion, one hundred twenty-one billion, two hundred twenty-two million, two thousand, twenty-one".