1213001011123 has 8 divisors (see below), whose sum is σ = 1332932765040. Its totient is φ = 1094679079680.

The previous prime is 1213001011051. The next prime is 1213001011151. The reversal of 1213001011123 is 3211101003121.

It is a happy number.

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 1213001011123 - 2²⁵ = 1212967456691 is a prime.

It is a super-2 number, since 2×1213001011123² (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 = 1213001011097 and 1213001011106.

It is not an unprimeable number, because it can be changed into a prime (1213001011193) 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, 402454038 + ... + 402457051.

It is an arithmetic number, because the mean of its divisors is an integer number (166616595630).

Almost surely, 2^{1213001011123} is an apocalyptic number.

1213001011123 is a deficient number, since it is larger than the sum of its proper divisors (119931753917).

1213001011123 is a wasteful number, since it uses less digits than its factorization.

1213001011123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 804911237.

The product of its (nonzero) digits is 36, while the sum is 16.

Adding to 1213001011123 its reverse (3211101003121), we get a palindrome (4424102014244).

The spelling of 1213001011123 in words is "one trillion, two hundred thirteen billion, one million, eleven thousand, one hundred twenty-three".