1221000202195 has 16 divisors (see below), whose sum is σ = 1475969231808. Its totient is φ = 969621552640.

The previous prime is 1221000202189. The next prime is 1221000202211. The reversal of 1221000202195 is 5912020001221.

It is not a de Polignac number, because 1221000202195 - 2³ = 1221000202187 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20470215 + ... + 20529775.

It is an arithmetic number, because the mean of its divisors is an integer number (92248076988).

Almost surely, 2^{1221000202195} is an apocalyptic number.

1221000202195 is a deficient number, since it is larger than the sum of its proper divisors (254969029613).

1221000202195 is a wasteful number, since it uses less digits than its factorization.

1221000202195 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89630.

The product of its (nonzero) digits is 720, while the sum is 25.

The spelling of 1221000202195 in words is "one trillion, two hundred twenty-one billion, two hundred two thousand, one hundred ninety-five".