21212131112300 has 72 divisors (see below), whose sum is σ = 48819047276832. Its totient is φ = 7982897472000.

The previous prime is 21212131112299. The next prime is 21212131112311. The reversal of 21212131112300 is 321113121212.

It is a super-2 number, since 2×21212131112300² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 75455321 + ... + 75735920.

Almost surely, 2^{21212131112300} is an apocalyptic number.

21212131112300 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21212131112300 is an abundant number, since it is smaller than the sum of its proper divisors (27606916164532).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21212131112300 is a wasteful number, since it uses less digits than its factorization.

21212131112300 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151191339 (or 151191332 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 20.

Adding to 21212131112300 its reverse (321113121212), we get a palindrome (21533244233512).

The spelling of 21212131112300 in words is "twenty-one trillion, two hundred twelve billion, one hundred thirty-one million, one hundred twelve thousand, three hundred".