1220002022121 has 32 divisors (see below), whose sum is σ = 1686504758400. Its totient is φ = 783912222720.

The previous prime is 1220002022101. The next prime is 1220002022123. The reversal of 1220002022121 is 1212202000221.

It is not a de Polignac number, because 1220002022121 - 2⁷ = 1220002021993 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1220002022121.

It is not an unprimeable number, because it can be changed into a prime (1220002022123) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12947145 + ... + 13041033.

It is an arithmetic number, because the mean of its divisors is an integer number (52703273700).

Almost surely, 2^{1220002022121} is an apocalyptic number.

It is an amenable number.

1220002022121 is a deficient number, since it is larger than the sum of its proper divisors (466502736279).

1220002022121 is a wasteful number, since it uses less digits than its factorization.

1220002022121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95209.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 1220002022121 its reverse (1212202000221), we get a palindrome (2432204022342).

The spelling of 1220002022121 in words is "one trillion, two hundred twenty billion, two million, twenty-two thousand, one hundred twenty-one".