1222202120021 has 8 divisors (see below), whose sum is σ = 1223951394240. Its totient is φ = 1220453127712.

The previous prime is 1222202119951. The next prime is 1222202120033. The reversal of 1222202120021 is 1200212022221.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 1222202120021 - 2²² = 1222197925717 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1222202120221) 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, 9538145 + ... + 9665433.

It is an arithmetic number, because the mean of its divisors is an integer number (152993924280).

Almost surely, 2^{1222202120021} is an apocalyptic number.

It is an amenable number.

1222202120021 is a deficient number, since it is larger than the sum of its proper divisors (1749274219).

1222202120021 is a wasteful number, since it uses less digits than its factorization.

1222202120021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140955.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 1222202120021 its reverse (1200212022221), we get a palindrome (2422414142242).

The spelling of 1222202120021 in words is "one trillion, two hundred twenty-two billion, two hundred two million, one hundred twenty thousand, twenty-one".