121000002031 has 4 divisors (see below), whose sum is σ = 121113193000. Its totient is φ = 120886811064.

The previous prime is 121000002017. The next prime is 121000002037. The reversal of 121000002031 is 130200000121.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 121000002031 - 2¹⁵ = 120999969263 is a prime.

It is a super-3 number, since 3×121000002031³ (a number of 34 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121000001999 and 121000002017.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121000002037) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 56593881 + ... + 56596018.

It is an arithmetic number, because the mean of its divisors is an integer number (30278298250).

Almost surely, 2^121000002031 is an apocalyptic number.

121000002031 is a deficient number, since it is larger than the sum of its proper divisors (113190969).

121000002031 is a wasteful number, since it uses less digits than its factorization.

121000002031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113190968.

The product of its (nonzero) digits is 12, while the sum is 10.

Adding to 121000002031 its reverse (130200000121), we get a palindrome (251200002152).

The spelling of 121000002031 in words is "one hundred twenty-one billion, two thousand, thirty-one".