21101212312330 has 32 divisors (see below), whose sum is σ = 39297778041600. Its totient is φ = 8148217180992.

The previous prime is 21101212312307. The next prime is 21101212312333. The reversal of 21101212312330 is 3321321210112.

It is a super-2 number, since 2×21101212312330² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21101212312333) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3483760 + ... + 7371499.

It is an arithmetic number, because the mean of its divisors is an integer number (1228055563800).

Almost surely, 2^{21101212312330} is an apocalyptic number.

21101212312330 is a deficient number, since it is larger than the sum of its proper divisors (18196565729270).

21101212312330 is a wasteful number, since it uses less digits than its factorization.

21101212312330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10861998.

The product of its (nonzero) digits is 432, while the sum is 22.

Adding to 21101212312330 its reverse (3321321210112), we get a palindrome (24422533522442).

The spelling of 21101212312330 in words is "twenty-one trillion, one hundred one billion, two hundred twelve million, three hundred twelve thousand, three hundred thirty".