1121210421 has 8 divisors (see below), whose sum is σ = 1498791840. Its totient is φ = 745551312.

The previous prime is 1121210411. The next prime is 1121210429. The reversal of 1121210421 is 1240121211.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1121210421 - 2⁹ = 1121209909 is a prime.

It is a super-2 number, since 2×1121210421² = 2514225616317994482, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1121210421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121210429) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 479215 + ... + 481548.

It is an arithmetic number, because the mean of its divisors is an integer number (187348980).

Almost surely, 2^1121210421 is an apocalyptic number.

It is an amenable number.

1121210421 is a deficient number, since it is larger than the sum of its proper divisors (377581419).

1121210421 is an equidigital number, since it uses as much as digits as its factorization.

1121210421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 961155.

The product of its (nonzero) digits is 32, while the sum is 15.

The square root of 1121210421 is about 33484.4803005810. The cubic root of 1121210421 is about 1038.8727990064.

Adding to 1121210421 its reverse (1240121211), we get a palindrome (2361331632).

The spelling of 1121210421 in words is "one billion, one hundred twenty-one million, two hundred ten thousand, four hundred twenty-one".