4219122991 has 2 divisors, whose sum is σ = 4219122992. Its totient is φ = 4219122990.

The previous prime is 4219122953. The next prime is 4219123009. The reversal of 4219122991 is 1992219124.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 4219122991 - 2²³ = 4210734383 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4219122091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2109561495 + 2109561496.

It is an arithmetic number, because the mean of its divisors is an integer number (2109561496).

Almost surely, 2^4219122991 is an apocalyptic number.

4219122991 is a deficient number, since it is larger than the sum of its proper divisors (1).

4219122991 is an equidigital number, since it uses as much as digits as its factorization.

4219122991 is an evil number, because the sum of its binary digits is even.

The product of its digits is 23328, while the sum is 40.

The square root of 4219122991 is about 64954.7765064279. The cubic root of 4219122991 is about 1615.8736359576.

The spelling of 4219122991 in words is "four billion, two hundred nineteen million, one hundred twenty-two thousand, nine hundred ninety-one".