21022221020122 has 48 divisors (see below), whose sum is σ = 36797937959808. Its totient is φ = 8980986940800.

The previous prime is 21022221020083. The next prime is 21022221020159. The reversal of 21022221020122 is 22102012222012.

It is a self number, because there is not a number n which added to its sum of digits gives 21022221020122.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 58256253 + ... + 58615999.

It is an arithmetic number, because the mean of its divisors is an integer number (766623707496).

Almost surely, 2^{21022221020122} is an apocalyptic number.

21022221020122 is a deficient number, since it is larger than the sum of its proper divisors (15775716939686).

21022221020122 is a wasteful number, since it uses less digits than its factorization.

21022221020122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 361651 (or 361644 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 21022221020122 its reverse (22102012222012), we get a palindrome (43124233242134).

The spelling of 21022221020122 in words is "twenty-one trillion, twenty-two billion, two hundred twenty-one million, twenty thousand, one hundred twenty-two".