21223033131 has 8 divisors (see below), whose sum is σ = 28655572480. Its totient is φ = 13969591272.

The previous prime is 21223033127. The next prime is 21223033147. The reversal of 21223033131 is 13133032212.

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

It is not a de Polignac number, because 21223033131 - 2² = 21223033127 is a prime.

It is a super-2 number, since 2×21223033131² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21223033098 and 21223033107.

It is not an unprimeable number, because it can be changed into a prime (21223033151) 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, 44774095 + ... + 44774568.

It is an arithmetic number, because the mean of its divisors is an integer number (3581946560).

Almost surely, 2^21223033131 is an apocalyptic number.

21223033131 is a deficient number, since it is larger than the sum of its proper divisors (7432539349).

21223033131 is an equidigital number, since it uses as much as digits as its factorization.

21223033131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89548745.

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 21223033131 its reverse (13133032212), we get a palindrome (34356065343).

The spelling of 21223033131 in words is "twenty-one billion, two hundred twenty-three million, thirty-three thousand, one hundred thirty-one".