21002101120022 has 32 divisors (see below), whose sum is σ = 34415486219520. Its totient is φ = 9532964769120.

The previous prime is 21002101119991. The next prime is 21002101120037. The reversal of 21002101120022 is 22002110120012.

It is a junction number, because it is equal to n+sod(n) for n = 21002101119979 and 21002101120006.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 158412653 + ... + 158545175.

It is an arithmetic number, because the mean of its divisors is an integer number (1075483944360).

Almost surely, 2^{21002101120022} is an apocalyptic number.

21002101120022 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21002101120022 is a deficient number, since it is larger than the sum of its proper divisors (13413385099498).

21002101120022 is a wasteful number, since it uses less digits than its factorization.

21002101120022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142628.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 21002101120022 its reverse (22002110120012), we get a palindrome (43004211240034).

The spelling of 21002101120022 in words is "twenty-one trillion, two billion, one hundred one million, one hundred twenty thousand, twenty-two".