121283731 has 2 divisors, whose sum is σ = 121283732. Its totient is φ = 121283730.

The previous prime is 121283719. The next prime is 121283741. The reversal of 121283731 is 137382121.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121283731 is a prime.

It is a super-2 number, since 2×121283731² = 29419486810560722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 121283731.

It is not a weakly prime, because it can be changed into another prime (121283711) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60641865 + 60641866.

It is an arithmetic number, because the mean of its divisors is an integer number (60641866).

Almost surely, 2^121283731 is an apocalyptic number.

121283731 is a deficient number, since it is larger than the sum of its proper divisors (1).

121283731 is an equidigital number, since it uses as much as digits as its factorization.

121283731 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2016, while the sum is 28.

The square root of 121283731 is about 11012.8893120743. The cubic root of 121283731 is about 494.9950426331.

The spelling of 121283731 in words is "one hundred twenty-one million, two hundred eighty-three thousand, seven hundred thirty-one".