21012303311230 has 64 divisors (see below), whose sum is σ = 47181694095360. Its totient is φ = 6545565619200.

The previous prime is 21012303311227. The next prime is 21012303311317. The reversal of 21012303311230 is 3211330321012.

It is a super-2 number, since 2×21012303311230² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6402451 + ... + 9111310.

It is an arithmetic number, because the mean of its divisors is an integer number (737213970240).

Almost surely, 2^{21012303311230} is an apocalyptic number.

21012303311230 is an abundant number, since it is smaller than the sum of its proper divisors (26169390784130).

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

21012303311230 is a wasteful number, since it uses less digits than its factorization.

21012303311230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15515545.

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 21012303311230 its reverse (3211330321012), we get a palindrome (24223633632242).

The spelling of 21012303311230 in words is "twenty-one trillion, twelve billion, three hundred three million, three hundred eleven thousand, two hundred thirty".