21220101023122 has 4 divisors (see below), whose sum is σ = 31830151534686. Its totient is φ = 10610050511560.

The previous prime is 21220101023119. The next prime is 21220101023129. The reversal of 21220101023122 is 22132010102212.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 19802313100441 + 1417787922681 = 4449979^2 + 1190709^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 21220101023122.

It is not an unprimeable number, because it can be changed into a prime (21220101023129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5305025255779 + ... + 5305025255782.

Almost surely, 2^{21220101023122} is an apocalyptic number.

21220101023122 is a deficient number, since it is larger than the sum of its proper divisors (10610050511564).

21220101023122 is a wasteful number, since it uses less digits than its factorization.

21220101023122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10610050511563.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 21220101023122 its reverse (22132010102212), we get a palindrome (43352111125334).

The spelling of 21220101023122 in words is "twenty-one trillion, two hundred twenty billion, one hundred one million, twenty-three thousand, one hundred twenty-two".