1201109951 has 2 divisors, whose sum is σ = 1201109952. Its totient is φ = 1201109950.

The previous prime is 1201109941. The next prime is 1201109977. The reversal of 1201109951 is 1599011021.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1201109951 - 2¹⁰ = 1201108927 is a prime.

It is a super-2 number, since 2×1201109951² = 2885330228782444802, which contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1201109941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 600554975 + 600554976.

It is an arithmetic number, because the mean of its divisors is an integer number (600554976).

Almost surely, 2^1201109951 is an apocalyptic number.

1201109951 is a deficient number, since it is larger than the sum of its proper divisors (1).

1201109951 is an equidigital number, since it uses as much as digits as its factorization.

1201109951 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 810, while the sum is 29.

The square root of 1201109951 is about 34657.0332111680. The cubic root of 1201109951 is about 1062.9861068119.

The spelling of 1201109951 in words is "one billion, two hundred one million, one hundred nine thousand, nine hundred fifty-one".