121022731 has 2 divisors, whose sum is σ = 121022732. Its totient is φ = 121022730.

The previous prime is 121022701. The next prime is 121022749. The reversal of 121022731 is 137220121.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121022731 is a prime.

It is a super-2 number, since 2×121022731² = 29293002837396722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 121022699 and 121022708.

It is not a weakly prime, because it can be changed into another prime (121022701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60511365 + 60511366.

It is an arithmetic number, because the mean of its divisors is an integer number (60511366).

Almost surely, 2^121022731 is an apocalyptic number.

121022731 is a deficient number, since it is larger than the sum of its proper divisors (1).

121022731 is an equidigital number, since it uses as much as digits as its factorization.

121022731 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 168, while the sum is 19.

The square root of 121022731 is about 11001.0331787519. The cubic root of 121022731 is about 494.6397147034.

Adding to 121022731 its reverse (137220121), we get a palindrome (258242852).

The spelling of 121022731 in words is "one hundred twenty-one million, twenty-two thousand, seven hundred thirty-one".