21111301230 has 32 divisors (see below), whose sum is σ = 50671208448. Its totient is φ = 5629226400.

The previous prime is 21111301213. The next prime is 21111301273. The reversal of 21111301230 is 3210311112.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 530115 + ... + 568545.

It is an arithmetic number, because the mean of its divisors is an integer number (1583475264).

Almost surely, 2^21111301230 is an apocalyptic number.

21111301230 is an abundant number, since it is smaller than the sum of its proper divisors (29559907218).

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

21111301230 is a wasteful number, since it uses less digits than its factorization.

21111301230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56752.

The product of its (nonzero) digits is 36, while the sum is 15.

Adding to 21111301230 its reverse (3210311112), we get a palindrome (24321612342).

The spelling of 21111301230 in words is "twenty-one billion, one hundred eleven million, three hundred one thousand, two hundred thirty".