1220100020197 has 8 divisors (see below), whose sum is σ = 1225765958144. Its totient is φ = 1214435820528.

The previous prime is 1220100020179. The next prime is 1220100020201. The reversal of 1220100020197 is 7910200010221.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1220100020197 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 (1220100020137) 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, 983203 + ... + 1845775.

It is an arithmetic number, because the mean of its divisors is an integer number (153220744768).

Almost surely, 2^{1220100020197} is an apocalyptic number.

It is an amenable number.

1220100020197 is a deficient number, since it is larger than the sum of its proper divisors (5665937947).

1220100020197 is an equidigital number, since it uses as much as digits as its factorization.

1220100020197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 869139.

The product of its (nonzero) digits is 504, while the sum is 25.

The spelling of 1220100020197 in words is "one trillion, two hundred twenty billion, one hundred million, twenty thousand, one hundred ninety-seven".