1220990121001 has 4 divisors (see below), whose sum is σ = 1395417281152. Its totient is φ = 1046562960852.

The previous prime is 1220990120971. The next prime is 1220990121019. The reversal of 1220990121001 is 1001210990221.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1220990121001 - 2⁷ = 1220990120873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1220990121041) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 87213580065 + ... + 87213580078.

It is an arithmetic number, because the mean of its divisors is an integer number (348854320288).

Almost surely, 2^{1220990121001} is an apocalyptic number.

It is an amenable number.

1220990121001 is a deficient number, since it is larger than the sum of its proper divisors (174427160151).

1220990121001 is an equidigital number, since it uses as much as digits as its factorization.

1220990121001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174427160150.

The product of its (nonzero) digits is 648, while the sum is 28.

The spelling of 1220990121001 in words is "one trillion, two hundred twenty billion, nine hundred ninety million, one hundred twenty-one thousand, one".