21132023123212 has 6 divisors (see below), whose sum is σ = 36981040465628. Its totient is φ = 10566011561604.

The previous prime is 21132023123161. The next prime is 21132023123221. The reversal of 21132023123212 is 21232132023112.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2641502890398 + ... + 2641502890405.

Almost surely, 2^{21132023123212} is an apocalyptic number.

It is an amenable number.

21132023123212 is a deficient number, since it is larger than the sum of its proper divisors (15849017342416).

21132023123212 is a wasteful number, since it uses less digits than its factorization.

21132023123212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5283005780807 (or 5283005780805 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 25.

Adding to 21132023123212 its reverse (21232132023112), we get a palindrome (42364155146324).

The spelling of 21132023123212 in words is "twenty-one trillion, one hundred thirty-two billion, twenty-three million, one hundred twenty-three thousand, two hundred twelve".