3121420427 has 2 divisors, whose sum is σ = 3121420428. Its totient is φ = 3121420426.

The previous prime is 3121420409. The next prime is 3121420457. The reversal of 3121420427 is 7240241213.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 3121420427 - 2¹⁸ = 3121158283 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 3121420396 and 3121420405.

It is not a weakly prime, because it can be changed into another prime (3121420457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1560710213 + 1560710214.

It is an arithmetic number, because the mean of its divisors is an integer number (1560710214).

Almost surely, 2^3121420427 is an apocalyptic number.

3121420427 is a deficient number, since it is larger than the sum of its proper divisors (1).

3121420427 is an equidigital number, since it uses as much as digits as its factorization.

3121420427 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2688, while the sum is 26.

The square root of 3121420427 is about 55869.6735895244. The cubic root of 3121420427 is about 1461.4504299644.

The spelling of 3121420427 in words is "three billion, one hundred twenty-one million, four hundred twenty thousand, four hundred twenty-seven".