1220020221001 has 16 divisors (see below), whose sum is σ = 1365065904960. Its totient is φ = 1083587051520.

The previous prime is 1220020220999. The next prime is 1220020221047. The reversal of 1220020221001 is 1001220200221.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1220020221001 - 2¹ = 1220020220999 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1220020221061) 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, 7265535 + ... + 7431556.

It is an arithmetic number, because the mean of its divisors is an integer number (85316619060).

Almost surely, 2^{1220020221001} is an apocalyptic number.

It is an amenable number.

1220020221001 is a deficient number, since it is larger than the sum of its proper divisors (145045683959).

1220020221001 is a wasteful number, since it uses less digits than its factorization.

1220020221001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14697384.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 1220020221001 its reverse (1001220200221), we get a palindrome (2221240421222).

The spelling of 1220020221001 in words is "one trillion, two hundred twenty billion, twenty million, two hundred twenty-one thousand, one".