21022011111001 has 16 divisors (see below), whose sum is σ = 21954388222080. Its totient is φ = 20091172527360.

The previous prime is 21022011110993. The next prime is 21022011111019. The reversal of 21022011111001 is 10011111022012.

It is a happy number.

It is not a de Polignac number, because 21022011111001 - 2³ = 21022011110993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21022011111301) 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, 133403665 + ... + 133561153.

It is an arithmetic number, because the mean of its divisors is an integer number (1372149263880).

Almost surely, 2^{21022011111001} is an apocalyptic number.

It is an amenable number.

21022011111001 is a deficient number, since it is larger than the sum of its proper divisors (932377111079).

21022011111001 is a wasteful number, since it uses less digits than its factorization.

21022011111001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162336.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 21022011111001 its reverse (10011111022012), we get a palindrome (31033122133013).

The spelling of 21022011111001 in words is "twenty-one trillion, twenty-two billion, eleven million, one hundred eleven thousand, one".