121121031 has 8 divisors (see below), whose sum is σ = 161548144. Its totient is φ = 80720640.

The previous prime is 121121003. The next prime is 121121083. The reversal of 121121031 is 130121121.

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

It is not a de Polignac number, because 121121031 - 2¹⁸ = 120858887 is a prime.

It is a super-2 number, since 2×121121031² = 29340608301005922, which contains 22 as substring.

It is the 11006-th Hogben number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121120998 and 121121016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121121431) by changing a digit.

It is a nontrivial repunit in base 11005.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9495 + ... + 18231.

It is an arithmetic number, because the mean of its divisors is an integer number (20193518).

Almost surely, 2^121121031 is an apocalyptic number.

121121031 is a deficient number, since it is larger than the sum of its proper divisors (40427113).

121121031 is an equidigital number, since it uses as much as digits as its factorization.

121121031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13361.

The product of its (nonzero) digits is 12, while the sum is 12.

The square root of 121121031 is about 11005.5000340739. The cubic root of 121121031 is about 494.7736011915.

Adding to 121121031 its reverse (130121121), we get a palindrome (251242152).

The spelling of 121121031 in words is "one hundred twenty-one million, one hundred twenty-one thousand, thirty-one".