10321221421 has 4 divisors (see below), whose sum is σ = 11795681632. Its totient is φ = 8846761212.

The previous prime is 10321221419. The next prime is 10321221433. The reversal of 10321221421 is 12412212301.

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 10321221421 - 2¹ = 10321221419 is a prime.

It is a super-2 number, since 2×10321221421² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10321221461) 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, 737230095 + ... + 737230108.

It is an arithmetic number, because the mean of its divisors is an integer number (2948920408).

Almost surely, 2^10321221421 is an apocalyptic number.

It is an amenable number.

10321221421 is a deficient number, since it is larger than the sum of its proper divisors (1474460211).

10321221421 is an equidigital number, since it uses as much as digits as its factorization.

10321221421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1474460210.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 10321221421 its reverse (12412212301), we get a palindrome (22733433722).

The spelling of 10321221421 in words is "ten billion, three hundred twenty-one million, two hundred twenty-one thousand, four hundred twenty-one".