21020011121122 has 8 divisors (see below), whose sum is σ = 33955402580316. Its totient is φ = 9701543594352.

The previous prime is 21020011121111. The next prime is 21020011121141. The reversal of 21020011121122 is 22112111002012.

It can be written as a sum of positive squares in 2 ways, for example, as 14755347530361 + 6264663590761 = 3841269^2 + 2502931^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 21020011121096 and 21020011121105.

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, 404230983073 + ... + 404230983124.

Almost surely, 2^{21020011121122} is an apocalyptic number.

21020011121122 is a deficient number, since it is larger than the sum of its proper divisors (12935391459194).

21020011121122 is a wasteful number, since it uses less digits than its factorization.

21020011121122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 808461966212.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 21020011121122 its reverse (22112111002012), we get a palindrome (43132122123134).

The spelling of 21020011121122 in words is "twenty-one trillion, twenty billion, eleven million, one hundred twenty-one thousand, one hundred twenty-two".