21012323011012 has 24 divisors (see below), whose sum is σ = 37051874942040. Its totient is φ = 10426376970240.

The previous prime is 21012323010971. The next prime is 21012323011039. The reversal of 21012323011012 is 21011032321012.

It can be written as a sum of positive squares in 4 ways, for example, as 229446748036 + 20782876262976 = 479006^2 + 4558824^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37716039 + ... + 38269102.

It is an arithmetic number, because the mean of its divisors is an integer number (1543828122585).

Almost surely, 2^{21012323011012} is an apocalyptic number.

It is an amenable number.

21012323011012 is a deficient number, since it is larger than the sum of its proper divisors (16039551931028).

21012323011012 is a wasteful number, since it uses less digits than its factorization.

21012323011012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75985671 (or 75985669 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 21012323011012 its reverse (21011032321012), we get a palindrome (42023355332024).

The spelling of 21012323011012 in words is "twenty-one trillion, twelve billion, three hundred twenty-three million, eleven thousand, twelve".