1220111002031 has 2 divisors, whose sum is σ = 1220111002032. Its totient is φ = 1220111002030.

The previous prime is 1220111002001. The next prime is 1220111002043. The reversal of 1220111002031 is 1302001110221.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1220111002031 - 2³⁴ = 1202931132847 is a prime.

It is a super-2 number, since 2×1220111002031² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1220111001997 and 1220111002015.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1220111002001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610055501015 + 610055501016.

It is an arithmetic number, because the mean of its divisors is an integer number (610055501016).

Almost surely, 2^{1220111002031} is an apocalyptic number.

1220111002031 is a deficient number, since it is larger than the sum of its proper divisors (1).

1220111002031 is an equidigital number, since it uses as much as digits as its factorization.

1220111002031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 1220111002031 its reverse (1302001110221), we get a palindrome (2522112112252).

The spelling of 1220111002031 in words is "one trillion, two hundred twenty billion, one hundred eleven million, two thousand, thirty-one".