2151121421163 has 64 divisors (see below), whose sum is σ = 3379750133760. Its totient is φ = 1199801116800.

The previous prime is 2151121421159. The next prime is 2151121421167. The reversal of 2151121421163 is 3611241211512.

It is an interprime number because it is at equal distance from previous prime (2151121421159) and next prime (2151121421167).

It is not a de Polignac number, because 2151121421163 - 2² = 2151121421159 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2151121421163.

It is not an unprimeable number, because it can be changed into a prime (2151121421167) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 210414670 + ... + 210424892.

It is an arithmetic number, because the mean of its divisors is an integer number (52808595840).

Almost surely, 2^{2151121421163} is an apocalyptic number.

2151121421163 is a deficient number, since it is larger than the sum of its proper divisors (1228628712597).

2151121421163 is a wasteful number, since it uses less digits than its factorization.

2151121421163 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11680.

The product of its digits is 2880, while the sum is 30.

Adding to 2151121421163 its reverse (3611241211512), we get a palindrome (5762362632675).

The spelling of 2151121421163 in words is "two trillion, one hundred fifty-one billion, one hundred twenty-one million, four hundred twenty-one thousand, one hundred sixty-three".