1201219951 has 2 divisors, whose sum is σ = 1201219952. Its totient is φ = 1201219950.

The previous prime is 1201219939. The next prime is 1201220021. The reversal of 1201219951 is 1599121021.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1201219951 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1201019951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 600609975 + 600609976.

It is an arithmetic number, because the mean of its divisors is an integer number (600609976).

Almost surely, 2^1201219951 is an apocalyptic number.

1201219951 is a deficient number, since it is larger than the sum of its proper divisors (1).

1201219951 is an equidigital number, since it uses as much as digits as its factorization.

1201219951 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1620, while the sum is 31.

The square root of 1201219951 is about 34658.6201542993. The cubic root of 1201219951 is about 1063.0185559374.

The spelling of 1201219951 in words is "one billion, two hundred one million, two hundred nineteen thousand, nine hundred fifty-one".