211221201023 has 8 divisors (see below), whose sum is σ = 254100693120. Its totient is φ = 171517967640.

The previous prime is 211221200977. The next prime is 211221201041. The reversal of 211221201023 is 320102122112.

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 211221201023 - 2⁸ = 211221200767 is a prime.

It is a super-2 number, since 2×211221201023² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 211221200992 and 211221201010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211221201053) 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, 794064533 + ... + 794064798.

It is an arithmetic number, because the mean of its divisors is an integer number (31762586640).

Almost surely, 2^211221201023 is an apocalyptic number.

211221201023 is a deficient number, since it is larger than the sum of its proper divisors (42879492097).

211221201023 is a wasteful number, since it uses less digits than its factorization.

211221201023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1588129357.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 211221201023 its reverse (320102122112), we get a palindrome (531323323135).

The spelling of 211221201023 in words is "two hundred eleven billion, two hundred twenty-one million, two hundred one thousand, twenty-three".