1221404241031 has 16 divisors (see below), whose sum is σ = 1319334408000. Its totient is φ = 1124043095808.

The previous prime is 1221404240993. The next prime is 1221404241053. The reversal of 1221404241031 is 1301424041221.

It is a cyclic number.

It is not a de Polignac number, because 1221404241031 - 2¹¹ = 1221404238983 is a prime.

It is a super-2 number, since 2×1221404241031² (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 = 1221404240987 and 1221404241005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221404241091) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35448510 + ... + 35482948.

It is an arithmetic number, because the mean of its divisors is an integer number (82458400500).

Almost surely, 2^{1221404241031} is an apocalyptic number.

1221404241031 is a deficient number, since it is larger than the sum of its proper divisors (97930166969).

1221404241031 is a wasteful number, since it uses less digits than its factorization.

1221404241031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42618.

The product of its (nonzero) digits is 1536, while the sum is 25.

Adding to 1221404241031 its reverse (1301424041221), we get a palindrome (2522828282252).

The spelling of 1221404241031 in words is "one trillion, two hundred twenty-one billion, four hundred four million, two hundred forty-one thousand, thirty-one".