1221040015031 has 16 divisors (see below), whose sum is σ = 1293533101440. Its totient is φ = 1149373476000.

The previous prime is 1221040015009. The next prime is 1221040015043. The reversal of 1221040015031 is 1305100401221.

It is a cyclic number.

It is not a de Polignac number, because 1221040015031 - 2⁶ = 1221040014967 is a prime.

It is a super-2 number, since 2×1221040015031² (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 = 1221040014994 and 1221040015012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221040015231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12099281 + ... + 12199781.

It is an arithmetic number, because the mean of its divisors is an integer number (80845818840).

Almost surely, 2^{1221040015031} is an apocalyptic number.

1221040015031 is a deficient number, since it is larger than the sum of its proper divisors (72493086409).

1221040015031 is a wasteful number, since it uses less digits than its factorization.

1221040015031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104606.

The product of its (nonzero) digits is 240, while the sum is 20.

Adding to 1221040015031 its reverse (1305100401221), we get a palindrome (2526140416252).

The spelling of 1221040015031 in words is "one trillion, two hundred twenty-one billion, forty million, fifteen thousand, thirty-one".