3420123413261 has 2 divisors, whose sum is σ = 3420123413262. Its totient is φ = 3420123413260.

The previous prime is 3420123413257. The next prime is 3420123413387. The reversal of 3420123413261 is 1623143210243.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1882260522025 + 1537862891236 = 1371955^2 + 1240106^2 .

It is an emirp because it is prime and its reverse (1623143210243) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3420123413261 - 2² = 3420123413257 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3420123413461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1710061706630 + 1710061706631.

It is an arithmetic number, because the mean of its divisors is an integer number (1710061706631).

Almost surely, 2^{3420123413261} is an apocalyptic number.

It is an amenable number.

3420123413261 is a deficient number, since it is larger than the sum of its proper divisors (1).

3420123413261 is an equidigital number, since it uses as much as digits as its factorization.

3420123413261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20736, while the sum is 32.

The spelling of 3420123413261 in words is "three trillion, four hundred twenty billion, one hundred twenty-three million, four hundred thirteen thousand, two hundred sixty-one".