1220123223031 has 4 divisors (see below), whose sum is σ = 1220126543064. Its totient is φ = 1220119903000.

The previous prime is 1220123223001. The next prime is 1220123223037. The reversal of 1220123223031 is 1303223210221.

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 1220123223031 - 2¹¹ = 1220123220983 is a prime.

It is a super-2 number, since 2×1220123223031² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1220123222993 and 1220123223011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220123223037) 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, 1028740 + ... + 1870441.

It is an arithmetic number, because the mean of its divisors is an integer number (305031635766).

Almost surely, 2^{1220123223031} is an apocalyptic number.

1220123223031 is a deficient number, since it is larger than the sum of its proper divisors (3320033).

1220123223031 is an equidigital number, since it uses as much as digits as its factorization.

1220123223031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3320032.

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 1220123223031 its reverse (1303223210221), we get a palindrome (2523346433252).

The spelling of 1220123223031 in words is "one trillion, two hundred twenty billion, one hundred twenty-three million, two hundred twenty-three thousand, thirty-one".