121121220031 has 8 divisors (see below), whose sum is σ = 140693501984. Its totient is φ = 102116250720.

The previous prime is 121121220013. The next prime is 121121220049. The reversal of 121121220031 is 130022121121.

It is an interprime number because it is at equal distance from previous prime (121121220013) and next prime (121121220049).

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

It is a cyclic number.

It is not a de Polignac number, because 121121220031 - 2¹⁹ = 121120695743 is a prime.

It is a super-2 number, since 2×121121220031² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 121121219987 and 121121220014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121121220931) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 141827700 + ... + 141828553.

It is an arithmetic number, because the mean of its divisors is an integer number (17586687748).

Almost surely, 2^121121220031 is an apocalyptic number.

121121220031 is a deficient number, since it is larger than the sum of its proper divisors (19572281953).

121121220031 is an equidigital number, since it uses as much as digits as its factorization.

121121220031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 283656321.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 121121220031 its reverse (130022121121), we get a palindrome (251143341152).

The spelling of 121121220031 in words is "one hundred twenty-one billion, one hundred twenty-one million, two hundred twenty thousand, thirty-one".