2121555343 has 2 divisors, whose sum is σ = 2121555344. Its totient is φ = 2121555342.

The previous prime is 2121555313. The next prime is 2121555353. The reversal of 2121555343 is 3435551212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2121555343 - 2⁵ = 2121555311 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2121555313) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1060777671 + 1060777672.

It is an arithmetic number, because the mean of its divisors is an integer number (1060777672).

Almost surely, 2^2121555343 is an apocalyptic number.

2121555343 is a deficient number, since it is larger than the sum of its proper divisors (1).

2121555343 is an equidigital number, since it uses as much as digits as its factorization.

2121555343 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18000, while the sum is 31.

The square root of 2121555343 is about 46060.3445818635. The cubic root of 2121555343 is about 1284.9457385981.

The spelling of 2121555343 in words is "two billion, one hundred twenty-one million, five hundred fifty-five thousand, three hundred forty-three".