21020010222012 has 24 divisors (see below), whose sum is σ = 49047050976336. Its totient is φ = 7006618579968.

The previous prime is 21020010222007. The next prime is 21020010222053. The reversal of 21020010222012 is 21022201002012.

It is a junction number, because it is equal to n+sod(n) for n = 21020010221982 and 21020010222000.

It is a congruent number.

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, 4717543 + ... + 8018430.

It is an arithmetic number, because the mean of its divisors is an integer number (2043627124014).

Almost surely, 2^{21020010222012} is an apocalyptic number.

It is an amenable number.

21020010222012 is an abundant number, since it is smaller than the sum of its proper divisors (28027040754324).

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

21020010222012 is a wasteful number, since it uses less digits than its factorization.

21020010222012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12873517 (or 12873515 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 21020010222012 its reverse (21022201002012), we get a palindrome (42042211224024).

The spelling of 21020010222012 in words is "twenty-one trillion, twenty billion, ten million, two hundred twenty-two thousand, twelve".