121222021031 has 4 divisors (see below), whose sum is σ = 121222747200. Its totient is φ = 121221294864.

The previous prime is 121222021013. The next prime is 121222021121. The reversal of 121222021031 is 130120222121.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 130120222121 = 17 ⋅7654130713.

It is a cyclic number.

It is not a de Polignac number, because 121222021031 - 2⁶ = 121222020967 is a prime.

It is a super-2 number, since 2×121222021031² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121222021001) 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, 27050 + ... + 493128.

It is an arithmetic number, because the mean of its divisors is an integer number (30305686800).

Almost surely, 2^121222021031 is an apocalyptic number.

121222021031 is a deficient number, since it is larger than the sum of its proper divisors (726169).

121222021031 is an equidigital number, since it uses as much as digits as its factorization.

121222021031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 726168.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 121222021031 its reverse (130120222121), we get a palindrome (251342243152).

The spelling of 121222021031 in words is "one hundred twenty-one billion, two hundred twenty-two million, twenty-one thousand, thirty-one".