212100012021031 has 2 divisors, whose sum is σ = 212100012021032. Its totient is φ = 212100012021030.

The previous prime is 212100012020993. The next prime is 212100012021059. The reversal of 212100012021031 is 130120210001212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 212100012021031 - 2³⁵ = 212065652282663 is a prime.

It is a super-2 number, since 2×212100012021031² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 212100012020996 and 212100012021014.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212100012021061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106050006010515 + 106050006010516.

It is an arithmetic number, because the mean of its divisors is an integer number (106050006010516).

Almost surely, 2^{212100012021031} is an apocalyptic number.

212100012021031 is a deficient number, since it is larger than the sum of its proper divisors (1).

212100012021031 is an equidigital number, since it uses as much as digits as its factorization.

212100012021031 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 212100012021031 its reverse (130120210001212), we get a palindrome (342220222022243).

The spelling of 212100012021031 in words is "two hundred twelve trillion, one hundred billion, twelve million, twenty-one thousand, thirty-one".