1220100211209 has 32 divisors (see below), whose sum is σ = 1801898956800. Its totient is φ = 728167527360.

The previous prime is 1220100211181. The next prime is 1220100211241. The reversal of 1220100211209 is 9021120010221.

It is not a de Polignac number, because 1220100211209 - 2⁷ = 1220100211081 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1220100211249) 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, 370627 + ... + 1605479.

It is an arithmetic number, because the mean of its divisors is an integer number (56309342400).

Almost surely, 2^{1220100211209} is an apocalyptic number.

It is an amenable number.

1220100211209 is a deficient number, since it is larger than the sum of its proper divisors (581798745591).

1220100211209 is a wasteful number, since it uses less digits than its factorization.

1220100211209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1235325.

The product of its (nonzero) digits is 144, while the sum is 21.

The spelling of 1220100211209 in words is "one trillion, two hundred twenty billion, one hundred million, two hundred eleven thousand, two hundred nine".