121771271031 has 24 divisors (see below), whose sum is σ = 172610194944. Its totient is φ = 76345253760.

The previous prime is 121771271009. The next prime is 121771271033. The reversal of 121771271031 is 130172177121.

It is not a de Polignac number, because 121771271031 - 2¹⁰ = 121771270007 is a prime.

It is a super-2 number, since 2×121771271031² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 121771270983 and 121771271001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121771271033) 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, 1057626 + ... + 1167096.

It is an arithmetic number, because the mean of its divisors is an integer number (7192091456).

Almost surely, 2^121771271031 is an apocalyptic number.

121771271031 is a deficient number, since it is larger than the sum of its proper divisors (50838923913).

121771271031 is a wasteful number, since it uses less digits than its factorization.

121771271031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110791 (or 110774 counting only the distinct ones).

The product of its (nonzero) digits is 4116, while the sum is 33.

The spelling of 121771271031 in words is "one hundred twenty-one billion, seven hundred seventy-one million, two hundred seventy-one thousand, thirty-one".