1221122131023 has 8 divisors (see below), whose sum is σ = 1637912320128. Its totient is φ = 809206681304.

The previous prime is 1221122131007. The next prime is 1221122131027. The reversal of 1221122131023 is 3201312211221.

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 1221122131023 - 2⁴ = 1221122131007 is a prime.

It is a super-2 number, since 2×1221122131023² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221122131027) 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, 1218684261 + ... + 1218685262.

It is an arithmetic number, because the mean of its divisors is an integer number (204739040016).

Almost surely, 2^{1221122131023} is an apocalyptic number.

1221122131023 is a deficient number, since it is larger than the sum of its proper divisors (416790189105).

1221122131023 is a wasteful number, since it uses less digits than its factorization.

1221122131023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2437369693.

The product of its (nonzero) digits is 288, while the sum is 21.

Adding to 1221122131023 its reverse (3201312211221), we get a palindrome (4422434342244).

The spelling of 1221122131023 in words is "one trillion, two hundred twenty-one billion, one hundred twenty-two million, one hundred thirty-one thousand, twenty-three".