1220402131123 has 8 divisors (see below), whose sum is σ = 1394763914592. Its totient is φ = 1046045003136.

The previous prime is 1220402131099. The next prime is 1220402131141. The reversal of 1220402131123 is 3211312040221.

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

It is not a de Polignac number, because 1220402131123 - 2²¹ = 1220400033971 is a prime.

It is a super-2 number, since 2×1220402131123² (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 = 1220402131094 and 1220402131103.

It is not an unprimeable number, because it can be changed into a prime (1220402131153) 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, 582790 + ... + 1667467.

It is an arithmetic number, because the mean of its divisors is an integer number (174345489324).

Almost surely, 2^{1220402131123} is an apocalyptic number.

1220402131123 is a deficient number, since it is larger than the sum of its proper divisors (174361783469).

1220402131123 is an equidigital number, since it uses as much as digits as its factorization.

1220402131123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2327741.

The product of its (nonzero) digits is 576, while the sum is 22.

Adding to 1220402131123 its reverse (3211312040221), we get a palindrome (4431714171344).

The spelling of 1220402131123 in words is "one trillion, two hundred twenty billion, four hundred two million, one hundred thirty-one thousand, one hundred twenty-three".