211120021222001 has 4 divisors (see below), whose sum is σ = 211263542651904. Its totient is φ = 210976499792100.

The previous prime is 211120021221979. The next prime is 211120021222057. The reversal of 211120021222001 is 100222120021112.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 211120021222001 - 2⁴² = 206721974710897 is a prime.

It is a super-2 number, since 2×211120021222001² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (211120021222801) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 71760712745 + ... + 71760715686.

It is an arithmetic number, because the mean of its divisors is an integer number (52815885662976).

Almost surely, 2^{211120021222001} is an apocalyptic number.

It is an amenable number.

211120021222001 is a deficient number, since it is larger than the sum of its proper divisors (143521429903).

211120021222001 is a wasteful number, since it uses less digits than its factorization.

211120021222001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143521429902.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 211120021222001 its reverse (100222120021112), we get a palindrome (311342141243113).

The spelling of 211120021222001 in words is "two hundred eleven trillion, one hundred twenty billion, twenty-one million, two hundred twenty-two thousand, one".