2102100121031 has 2 divisors, whose sum is σ = 2102100121032. Its totient is φ = 2102100121030.

The previous prime is 2102100121027. The next prime is 2102100121127. The reversal of 2102100121031 is 1301210012012.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2102100121031 - 2² = 2102100121027 is a prime.

It is a super-2 number, since 2×2102100121031² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2102100120997 and 2102100121015.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2102100121021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1051050060515 + 1051050060516.

It is an arithmetic number, because the mean of its divisors is an integer number (1051050060516).

Almost surely, 2^{2102100121031} is an apocalyptic number.

2102100121031 is a deficient number, since it is larger than the sum of its proper divisors (1).

2102100121031 is an equidigital number, since it uses as much as digits as its factorization.

2102100121031 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 2102100121031 its reverse (1301210012012), we get a palindrome (3403310133043).

The spelling of 2102100121031 in words is "two trillion, one hundred two billion, one hundred million, one hundred twenty-one thousand, thirty-one".