1421111213 has 4 divisors (see below), whose sum is σ = 1495906560. Its totient is φ = 1346315868.

The previous prime is 1421111201. The next prime is 1421111233. The reversal of 1421111213 is 3121111241.

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 an emirpimes, since its reverse is a distinct semiprime: 3121111241 = 2917 ⋅1069973.

It is a cyclic number.

It is not a de Polignac number, because 1421111213 - 2¹⁶ = 1421045677 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1421111191 and 1421111200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1421111233) 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, 37397645 + ... + 37397682.

It is an arithmetic number, because the mean of its divisors is an integer number (373976640).

Almost surely, 2^1421111213 is an apocalyptic number.

It is an amenable number.

1421111213 is a deficient number, since it is larger than the sum of its proper divisors (74795347).

1421111213 is an equidigital number, since it uses as much as digits as its factorization.

1421111213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74795346.

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

The square root of 1421111213 is about 37697.6287450550. The cubic root of 1421111213 is about 1124.2839790754.

Adding to 1421111213 its reverse (3121111241), we get a palindrome (4542222454).

The spelling of 1421111213 in words is "one billion, four hundred twenty-one million, one hundred eleven thousand, two hundred thirteen".