1213022211101 has 4 divisors (see below), whose sum is σ = 1216686931104. Its totient is φ = 1209357491100.

The previous prime is 1213022211097. The next prime is 1213022211119. The reversal of 1213022211101 is 1011122203121.

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.

It is a cyclic number.

It is not a de Polignac number, because 1213022211101 - 2² = 1213022211097 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1213022211101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213022213101) 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, 1832359505 + ... + 1832360166.

It is an arithmetic number, because the mean of its divisors is an integer number (304171732776).

Almost surely, 2^{1213022211101} is an apocalyptic number.

It is an amenable number.

1213022211101 is a deficient number, since it is larger than the sum of its proper divisors (3664720003).

1213022211101 is an equidigital number, since it uses as much as digits as its factorization.

1213022211101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3664720002.

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 1213022211101 its reverse (1011122203121), we get a palindrome (2224144414222).

The spelling of 1213022211101 in words is "one trillion, two hundred thirteen billion, twenty-two million, two hundred eleven thousand, one hundred one".