1201421111291 has 2 divisors, whose sum is σ = 1201421111292. Its totient is φ = 1201421111290.

The previous prime is 1201421111269. The next prime is 1201421111323. The reversal of 1201421111291 is 1921111241021.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1201421111291 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1201421111291.

It is not a weakly prime, because it can be changed into another prime (1201421111221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 600710555645 + 600710555646.

It is an arithmetic number, because the mean of its divisors is an integer number (600710555646).

Almost surely, 2^{1201421111291} is an apocalyptic number.

1201421111291 is a deficient number, since it is larger than the sum of its proper divisors (1).

1201421111291 is an equidigital number, since it uses as much as digits as its factorization.

1201421111291 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 26.

The spelling of 1201421111291 in words is "one trillion, two hundred one billion, four hundred twenty-one million, one hundred eleven thousand, two hundred ninety-one".