1221002202195 has 64 divisors (see below), whose sum is σ = 2187280972800. Its totient is φ = 646222337280.

The previous prime is 1221002202151. The next prime is 1221002202227. The reversal of 1221002202195 is 5912022001221.

It is a happy number.

1221002202195 is a `hidden beast` number, since 1 + 221 + 0 + 0 + 220 + 219 + 5 = 666.

It is not a de Polignac number, because 1221002202195 - 2¹³ = 1221002194003 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 44891050 + ... + 44918240.

It is an arithmetic number, because the mean of its divisors is an integer number (34176265200).

Almost surely, 2^{1221002202195} is an apocalyptic number.

1221002202195 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1221002202195 is a deficient number, since it is larger than the sum of its proper divisors (966278770605).

1221002202195 is a wasteful number, since it uses less digits than its factorization.

1221002202195 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29737 (or 29731 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 27.

The spelling of 1221002202195 in words is "one trillion, two hundred twenty-one billion, two million, two hundred two thousand, one hundred ninety-five".