2121503953 has 2 divisors, whose sum is σ = 2121503954. Its totient is φ = 2121503952.

The previous prime is 2121503929. The next prime is 2121503983. The reversal of 2121503953 is 3593051212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1896863809 + 224640144 = 43553^2 + 14988^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2121503953 is a prime.

It is not a weakly prime, because it can be changed into another prime (2121503983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1060751976 + 1060751977.

It is an arithmetic number, because the mean of its divisors is an integer number (1060751977).

Almost surely, 2^2121503953 is an apocalyptic number.

It is an amenable number.

2121503953 is a deficient number, since it is larger than the sum of its proper divisors (1).

2121503953 is an equidigital number, since it uses as much as digits as its factorization.

2121503953 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8100, while the sum is 31.

The square root of 2121503953 is about 46059.7867233447. The cubic root of 2121503953 is about 1284.9353635219.

The spelling of 2121503953 in words is "two billion, one hundred twenty-one million, five hundred three thousand, nine hundred fifty-three".