121131738 has 48 divisors (see below), whose sum is σ = 323022336. Its totient is φ = 31946400.

The previous prime is 121131733. The next prime is 121131743. The reversal of 121131738 is 837131121.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (121131733) and next prime (121131743).

It is not an unprimeable number, because it can be changed into a prime (121131733) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 35338 + ... + 38613.

It is an arithmetic number, because the mean of its divisors is an integer number (6729632).

Almost surely, 2^121131738 is an apocalyptic number.

121131738 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

121131738 is an abundant number, since it is smaller than the sum of its proper divisors (201890598).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121131738 is a wasteful number, since it uses less digits than its factorization.

121131738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73979 (or 73976 counting only the distinct ones).

The product of its digits is 1008, while the sum is 27.

The square root of 121131738 is about 11005.9864619215. The cubic root of 121131738 is about 494.7881799557.

Adding to 121131738 its reverse (837131121), we get a palindrome (958262859).

The spelling of 121131738 in words is "one hundred twenty-one million, one hundred thirty-one thousand, seven hundred thirty-eight".