21022001011121 has 8 divisors (see below), whose sum is σ = 22933144380384. Its totient is φ = 19110866369920.

The previous prime is 21022001011111. The next prime is 21022001011133. The reversal of 21022001011121 is 12111010022012.

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

It is a cyclic number.

It is not a de Polignac number, because 21022001011121 - 2²² = 21021996816817 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21022001011096 and 21022001011105.

It is not an unprimeable number, because it can be changed into a prime (21022001011111) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3496610 + ... + 7366836.

It is an arithmetic number, because the mean of its divisors is an integer number (2866643047548).

Almost surely, 2^{21022001011121} is an apocalyptic number.

It is an amenable number.

21022001011121 is a deficient number, since it is larger than the sum of its proper divisors (1911143369263).

21022001011121 is a wasteful number, since it uses less digits than its factorization.

21022001011121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4364031.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 21022001011121 its reverse (12111010022012), we get a palindrome (33133011033133).

The spelling of 21022001011121 in words is "twenty-one trillion, twenty-two billion, one million, eleven thousand, one hundred twenty-one".