2100121222201 has 4 divisors (see below), whose sum is σ = 2105971142400. Its totient is φ = 2094271302004.

The previous prime is 2100121222163. The next prime is 2100121222229. The reversal of 2100121222201 is 1022221210012.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2100121222201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2100121222501) 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, 2924959561 + ... + 2924960278.

It is an arithmetic number, because the mean of its divisors is an integer number (526492785600).

Almost surely, 2^{2100121222201} is an apocalyptic number.

It is an amenable number.

2100121222201 is a deficient number, since it is larger than the sum of its proper divisors (5849920199).

2100121222201 is an equidigital number, since it uses as much as digits as its factorization.

2100121222201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5849920198.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 2100121222201 its reverse (1022221210012), we get a palindrome (3122342432213).

The spelling of 2100121222201 in words is "two trillion, one hundred billion, one hundred twenty-one million, two hundred twenty-two thousand, two hundred one".