1221010212031 has 2 divisors, whose sum is σ = 1221010212032. Its totient is φ = 1221010212030.

The previous prime is 1221010212017. The next prime is 1221010212067. The reversal of 1221010212031 is 1302120101221.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1221010212031 - 2⁷ = 1221010211903 is a prime.

It is a super-2 number, since 2×1221010212031² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1221010211996 and 1221010212014.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1221010212131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610505106015 + 610505106016.

It is an arithmetic number, because the mean of its divisors is an integer number (610505106016).

Almost surely, 2^{1221010212031} is an apocalyptic number.

1221010212031 is a deficient number, since it is larger than the sum of its proper divisors (1).

1221010212031 is an equidigital number, since it uses as much as digits as its factorization.

1221010212031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 1221010212031 its reverse (1302120101221), we get a palindrome (2523130313252).

The spelling of 1221010212031 in words is "one trillion, two hundred twenty-one billion, ten million, two hundred twelve thousand, thirty-one".