1002120121231 has 2 divisors, whose sum is σ = 1002120121232. Its totient is φ = 1002120121230.

The previous prime is 1002120121169. The next prime is 1002120121297. The reversal of 1002120121231 is 1321210212001.

1002120121231 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1002120121231 - 2¹⁷ = 1002119990159 is a prime.

It is a super-2 number, since 2×1002120121231² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1002120121031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 501060060615 + 501060060616.

It is an arithmetic number, because the mean of its divisors is an integer number (501060060616).

Almost surely, 2^{1002120121231} is an apocalyptic number.

1002120121231 is a deficient number, since it is larger than the sum of its proper divisors (1).

1002120121231 is an equidigital number, since it uses as much as digits as its factorization.

1002120121231 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 1002120121231 its reverse (1321210212001), we get a palindrome (2323330333232).

The spelling of 1002120121231 in words is "one trillion, two billion, one hundred twenty million, one hundred twenty-one thousand, two hundred thirty-one".