210101221123 has 8 divisors (see below), whose sum is σ = 219307334400. Its totient is φ = 200901047688.

The previous prime is 210101221111. The next prime is 210101221139. The reversal of 210101221123 is 321122101012.

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 210101221123 - 2³⁷ = 72662267651 is a prime.

It is a super-2 number, since 2×210101221123² (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 = 210101221097 and 210101221106.

It is not an unprimeable number, because it can be changed into a prime (210101221153) 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, 1412593 + ... + 1554226.

It is an arithmetic number, because the mean of its divisors is an integer number (27413416800).

Almost surely, 2^210101221123 is an apocalyptic number.

210101221123 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

210101221123 is a deficient number, since it is larger than the sum of its proper divisors (9206113277).

210101221123 is a wasteful number, since it uses less digits than its factorization.

210101221123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2969921.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 210101221123 its reverse (321122101012), we get a palindrome (531223322135).

The spelling of 210101221123 in words is "two hundred ten billion, one hundred one million, two hundred twenty-one thousand, one hundred twenty-three".