2121002195 has 16 divisors (see below), whose sum is σ = 2902223520. Its totient is φ = 1474143744.

The previous prime is 2121002159. The next prime is 2121002197. The reversal of 2121002195 is 5912001212.

It is a cyclic number.

It is not a de Polignac number, because 2121002195 - 2⁶ = 2121002131 is a prime.

It is a super-2 number, since 2×2121002195² = 8997300622389636050, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2121002195.

It is not an unprimeable number, because it can be changed into a prime (2121002197) 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, 958625 + ... + 960834.

It is an arithmetic number, because the mean of its divisors is an integer number (181388970).

Almost surely, 2^2121002195 is an apocalyptic number.

2121002195 is a deficient number, since it is larger than the sum of its proper divisors (781221325).

2121002195 is a wasteful number, since it uses less digits than its factorization.

2121002195 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1919494.

The product of its (nonzero) digits is 360, while the sum is 23.

The square root of 2121002195 is about 46054.3395892287. The cubic root of 2121002195 is about 1284.8340552917.

The spelling of 2121002195 in words is "two billion, one hundred twenty-one million, two thousand, one hundred ninety-five".