121613631 has 8 divisors (see below), whose sum is σ = 171689904. Its totient is φ = 76306560.

The previous prime is 121613629. The next prime is 121613633. The reversal of 121613631 is 136316121.

It is an interprime number because it is at equal distance from previous prime (121613629) and next prime (121613633).

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

It is not a de Polignac number, because 121613631 - 2¹ = 121613629 is a prime.

It is a super-2 number, since 2×121613631² = 29579750490008322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121613633) 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, 1192240 + ... + 1192341.

It is an arithmetic number, because the mean of its divisors is an integer number (21461238).

Almost surely, 2^121613631 is an apocalyptic number.

121613631 is a deficient number, since it is larger than the sum of its proper divisors (50076273).

121613631 is a wasteful number, since it uses less digits than its factorization.

121613631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2384601.

The product of its digits is 648, while the sum is 24.

The square root of 121613631 is about 11027.8570447753. The cubic root of 121613631 is about 495.4434430498.

Adding to 121613631 its reverse (136316121), we get a palindrome (257929752).

The spelling of 121613631 in words is "one hundred twenty-one million, six hundred thirteen thousand, six hundred thirty-one".