121001031 has 12 divisors (see below), whose sum is σ = 174976152. Its totient is φ = 80576496.

The previous prime is 121000993. The next prime is 121001033. The reversal of 121001031 is 130100121.

It is not a de Polignac number, because 121001031 - 2⁹ = 121000519 is a prime.

It is a super-2 number, since 2×121001031² = 29282499006125922, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121001033) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1425 + ... + 15621.

It is an arithmetic number, because the mean of its divisors is an integer number (14581346).

Almost surely, 2^121001031 is an apocalyptic number.

121001031 is a deficient number, since it is larger than the sum of its proper divisors (53975121).

121001031 is a wasteful number, since it uses less digits than its factorization.

121001031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15150 (or 15147 counting only the distinct ones).

The product of its (nonzero) digits is 6, while the sum is 9.

The square root of 121001031 is about 11000.0468635365. The cubic root of 121001031 is about 494.6101491187.

Adding to 121001031 its reverse (130100121), we get a palindrome (251101152).

It can be divided in two parts, 12100 and 1031, that added together give a palindrome (13131).

The spelling of 121001031 in words is "one hundred twenty-one million, one thousand, thirty-one".