102021011111213 has 2 divisors, whose sum is σ = 102021011111214. Its totient is φ = 102021011111212.

The previous prime is 102021011111143. The next prime is 102021011111387. The reversal of 102021011111213 is 312111110120201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 87618173969764 + 14402837141449 = 9360458^2 + 3795107^2 .

It is a cyclic number.

It is not a de Polignac number, because 102021011111213 - 2¹⁰ = 102021011110189 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 102021011111191 and 102021011111200.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102021011131213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51010505555606 + 51010505555607.

It is an arithmetic number, because the mean of its divisors is an integer number (51010505555607).

Almost surely, 2^{102021011111213} is an apocalyptic number.

It is an amenable number.

102021011111213 is a deficient number, since it is larger than the sum of its proper divisors (1).

102021011111213 is an equidigital number, since it uses as much as digits as its factorization.

102021011111213 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 17.

Adding to 102021011111213 its reverse (312111110120201), we get a palindrome (414132121231414).

The spelling of 102021011111213 in words is "one hundred two trillion, twenty-one billion, eleven million, one hundred eleven thousand, two hundred thirteen".