1222002021121 has 8 divisors (see below), whose sum is σ = 1401543753984. Its totient is φ = 1043702792160.

The previous prime is 1222002021113. The next prime is 1222002021173. The reversal of 1222002021121 is 1211202002221.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1222002021121 - 2³ = 1222002021113 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1222002021095 and 1222002021104.

It is not an unprimeable number, because it can be changed into a prime (1222002021101) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 310623865 + ... + 310627798.

It is an arithmetic number, because the mean of its divisors is an integer number (175192969248).

Almost surely, 2^{1222002021121} is an apocalyptic number.

It is an amenable number.

1222002021121 is a deficient number, since it is larger than the sum of its proper divisors (179541732863).

1222002021121 is an equidigital number, since it uses as much as digits as its factorization.

1222002021121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 621251951.

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

Adding to 1222002021121 its reverse (1211202002221), we get a palindrome (2433204023342).

The spelling of 1222002021121 in words is "one trillion, two hundred twenty-two billion, two million, twenty-one thousand, one hundred twenty-one".