21021111120122 has 8 divisors (see below), whose sum is σ = 32002288571136. Its totient is φ = 10353681596412.

The previous prime is 21021111120089. The next prime is 21021111120137. The reversal of 21021111120122 is 22102111112012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×21021111120122² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21021111120122.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 78436981658 + ... + 78436981925.

It is an arithmetic number, because the mean of its divisors is an integer number (4000286071392).

Almost surely, 2^{21021111120122} is an apocalyptic number.

21021111120122 is a deficient number, since it is larger than the sum of its proper divisors (10981177451014).

21021111120122 is a wasteful number, since it uses less digits than its factorization.

21021111120122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156873963652.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 21021111120122 its reverse (22102111112012), we get a palindrome (43123222232134).

It can be divided in two parts, 2102111112012 and 2, that multiplied together give a palindrome (4204222224024).

The spelling of 21021111120122 in words is "twenty-one trillion, twenty-one billion, one hundred eleven million, one hundred twenty thousand, one hundred twenty-two".