1221032001031 has 2 divisors, whose sum is σ = 1221032001032. Its totient is φ = 1221032001030.

The previous prime is 1221032001017. The next prime is 1221032001037. The reversal of 1221032001031 is 1301002301221.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1221032001031 - 2²³ = 1221023612423 is a prime.

It is a super-2 number, since 2×1221032001031² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1221032000996 and 1221032001014.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1221032001037) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610516000515 + 610516000516.

It is an arithmetic number, because the mean of its divisors is an integer number (610516000516).

Almost surely, 2^{1221032001031} is an apocalyptic number.

1221032001031 is a deficient number, since it is larger than the sum of its proper divisors (1).

1221032001031 is an equidigital number, since it uses as much as digits as its factorization.

1221032001031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 1221032001031 its reverse (1301002301221), we get a palindrome (2522034302252).

The spelling of 1221032001031 in words is "one trillion, two hundred twenty-one billion, thirty-two million, one thousand, thirty-one".