21000302111100 has 144 divisors (see below), whose sum is σ = 65438539880672. Its totient is φ = 5169008701440.

The previous prime is 21000302111081. The next prime is 21000302111119. The reversal of 21000302111100 is 111120300012.

It is an interprime number because it is at equal distance from previous prime (21000302111081) and next prime (21000302111119).

It is a super-2 number, since 2×21000302111100² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 72211584 + ... + 72501816.

Almost surely, 2^{21000302111100} is an apocalyptic number.

21000302111100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21000302111100 is an abundant number, since it is smaller than the sum of its proper divisors (44438237769572).

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

21000302111100 is a wasteful number, since it uses less digits than its factorization.

21000302111100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 308816 (or 308809 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 12.

Adding to 21000302111100 its reverse (111120300012), we get a palindrome (21111422411112).

The spelling of 21000302111100 in words is "twenty-one trillion, three hundred two million, one hundred eleven thousand, one hundred".