21020030020012 has 12 divisors (see below), whose sum is σ = 36787079498400. Its totient is φ = 10509435877616.

The previous prime is 21020030019929. The next prime is 21020030020013. The reversal of 21020030020012 is 21002003002012.

It is a super-2 number, since 2×21020030020012² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21020030019974 and 21020030020001.

It is not an unprimeable number, because it can be changed into a prime (21020030020013) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 144701428 + ... + 144846619.

It is an arithmetic number, because the mean of its divisors is an integer number (3065589958200).

Almost surely, 2^{21020030020012} is an apocalyptic number.

It is an amenable number.

21020030020012 is a deficient number, since it is larger than the sum of its proper divisors (15767049478388).

21020030020012 is a wasteful number, since it uses less digits than its factorization.

21020030020012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 289566200 (or 289566198 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 13.

Adding to 21020030020012 its reverse (21002003002012), we get a palindrome (42022033022024).

The spelling of 21020030020012 in words is "twenty-one trillion, twenty billion, thirty million, twenty thousand, twelve".