210101011213 has 4 divisors (see below), whose sum is σ = 210102035040. Its totient is φ = 210099987388.

The previous prime is 210101011201. The next prime is 210101011261. The reversal of 210101011213 is 312110101012.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-210101011213 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 210101011193 and 210101011202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210101011273) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 85945 + ... + 653902.

It is an arithmetic number, because the mean of its divisors is an integer number (52525508760).

Almost surely, 2^210101011213 is an apocalyptic number.

It is an amenable number.

210101011213 is a deficient number, since it is larger than the sum of its proper divisors (1023827).

210101011213 is an equidigital number, since it uses as much as digits as its factorization.

210101011213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1023826.

The product of its (nonzero) digits is 12, while the sum is 13.

Adding to 210101011213 its reverse (312110101012), we get a palindrome (522211112225).

The spelling of 210101011213 in words is "two hundred ten billion, one hundred one million, eleven thousand, two hundred thirteen".