1221102210201 has 32 divisors (see below), whose sum is σ = 1746307482240. Its totient is φ = 756716027904.

The previous prime is 1221102210173. The next prime is 1221102210233. The reversal of 1221102210201 is 1020122011221.

It is not a de Polignac number, because 1221102210201 - 2¹⁹ = 1221101685913 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1221102210101) 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, 42805 + ... + 1563341.

It is an arithmetic number, because the mean of its divisors is an integer number (54572108820).

Almost surely, 2^{1221102210201} is an apocalyptic number.

It is an amenable number.

1221102210201 is a deficient number, since it is larger than the sum of its proper divisors (525205272039).

1221102210201 is a wasteful number, since it uses less digits than its factorization.

1221102210201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1520825.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 1221102210201 its reverse (1020122011221), we get a palindrome (2241224221422).

The spelling of 1221102210201 in words is "one trillion, two hundred twenty-one billion, one hundred two million, two hundred ten thousand, two hundred one".