1221220010201 has 16 divisors (see below), whose sum is σ = 1294999617600. Its totient is φ = 1148392482048.

The previous prime is 1221220010183. The next prime is 1221220010221. The reversal of 1221220010201 is 1020100221221.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1221220010201 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1221220010221) 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, 46682141 + ... + 46708293.

It is an arithmetic number, because the mean of its divisors is an integer number (80937476100).

Almost surely, 2^{1221220010201} is an apocalyptic number.

It is an amenable number.

1221220010201 is a deficient number, since it is larger than the sum of its proper divisors (73779607399).

1221220010201 is a wasteful number, since it uses less digits than its factorization.

1221220010201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44248.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 1221220010201 its reverse (1020100221221), we get a palindrome (2241320231422).

The spelling of 1221220010201 in words is "one trillion, two hundred twenty-one billion, two hundred twenty million, ten thousand, two hundred one".