21022011121001 has 16 divisors (see below), whose sum is σ = 23493297240000. Its totient is φ = 18644124441600.

The previous prime is 21022011120997. The next prime is 21022011121019. The reversal of 21022011121001 is 10012111022012.

It is a cyclic number.

It is not a de Polignac number, because 21022011121001 - 2² = 21022011120997 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21022011121201) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11843225 + ... + 13502073.

It is an arithmetic number, because the mean of its divisors is an integer number (1468331077500).

Almost surely, 2^{21022011121001} is an apocalyptic number.

It is an amenable number.

21022011121001 is a deficient number, since it is larger than the sum of its proper divisors (2471286118999).

21022011121001 is a wasteful number, since it uses less digits than its factorization.

21022011121001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1687000.

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

Adding to 21022011121001 its reverse (10012111022012), we get a palindrome (31034122143013).

The spelling of 21022011121001 in words is "twenty-one trillion, twenty-two billion, eleven million, one hundred twenty-one thousand, one".