210121201122199 has 4 divisors (see below), whose sum is σ = 222481271776464. Its totient is φ = 197761130467936.

The previous prime is 210121201122179. The next prime is 210121201122211. The reversal of 210121201122199 is 991221102121012.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 210121201122199 - 2⁵ = 210121201122167 is a prime.

It is a super-2 number, since 2×210121201122199² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210121201122169) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6180035327107 + ... + 6180035327140.

It is an arithmetic number, because the mean of its divisors is an integer number (55620317944116).

Almost surely, 2^{210121201122199} is an apocalyptic number.

210121201122199 is a deficient number, since it is larger than the sum of its proper divisors (12360070654265).

210121201122199 is a wasteful number, since it uses less digits than its factorization.

210121201122199 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12360070654264.

The product of its (nonzero) digits is 2592, while the sum is 34.

The spelling of 210121201122199 in words is "two hundred ten trillion, one hundred twenty-one billion, two hundred one million, one hundred twenty-two thousand, one hundred ninety-nine".