21111031401300 has 90 divisors (see below), whose sum is σ = 68433623668718. Its totient is φ = 5629608371520.

The previous prime is 21111031401227. The next prime is 21111031401331. The reversal of 21111031401300 is 310413011112.

It is a happy number.

21111031401300 is a `hidden beast` number, since 211 + 1 + 10 + 3 + 140 + 1 + 300 = 666.

It can be written as a sum of positive squares in 3 ways, for example, as 569523790224 + 20541507611076 = 754668^2 + 4532274^2 .

It is a tau number, because it is divible by the number of its divisors (90).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 1303141987 + ... + 1303158186.

Almost surely, 2^{21111031401300} is an apocalyptic number.

21111031401300 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21111031401300 is an abundant number, since it is smaller than the sum of its proper divisors (47322592267418).

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

21111031401300 is a wasteful number, since it uses less digits than its factorization.

21111031401300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2606300199 (or 2606300183 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

Adding to 21111031401300 its reverse (310413011112), we get a palindrome (21421444412412).

The spelling of 21111031401300 in words is "twenty-one trillion, one hundred eleven billion, thirty-one million, four hundred one thousand, three hundred".