2121205622151 has 64 divisors (see below), whose sum is σ = 3735339826176. Its totient is φ = 1036617369600.

The previous prime is 2121205622147. The next prime is 2121205622167. The reversal of 2121205622151 is 1512265021212.

It is not a de Polignac number, because 2121205622151 - 2² = 2121205622147 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121205622051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 8281561 + ... + 8533853.

It is an arithmetic number, because the mean of its divisors is an integer number (58364684784).

Almost surely, 2^{2121205622151} is an apocalyptic number.

2121205622151 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

2121205622151 is a deficient number, since it is larger than the sum of its proper divisors (1614134204025).

2121205622151 is a wasteful number, since it uses less digits than its factorization.

2121205622151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 254472.

The product of its (nonzero) digits is 4800, while the sum is 30.

The spelling of 2121205622151 in words is "two trillion, one hundred twenty-one billion, two hundred five million, six hundred twenty-two thousand, one hundred fifty-one".