121147631 has 8 divisors (see below), whose sum is σ = 132973824. Its totient is φ = 109456920.

The previous prime is 121147619. The next prime is 121147633. The reversal of 121147631 is 136741121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 121147631 - 2²² = 116953327 is a prime.

It is a super-2 number, since 2×121147631² = 29353496993824322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 121147631.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121147633) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31991 + ... + 35576.

It is an arithmetic number, because the mean of its divisors is an integer number (16621728).

Almost surely, 2^121147631 is an apocalyptic number.

121147631 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

121147631 is a deficient number, since it is larger than the sum of its proper divisors (11826193).

121147631 is a wasteful number, since it uses less digits than its factorization.

121147631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67741.

The product of its digits is 1008, while the sum is 26.

The square root of 121147631 is about 11006.7084543927. The cubic root of 121147631 is about 494.8098184483.

Adding to 121147631 its reverse (136741121), we get a palindrome (257888752).

The spelling of 121147631 in words is "one hundred twenty-one million, one hundred forty-seven thousand, six hundred thirty-one".