210211121101 has 4 divisors (see below), whose sum is σ = 212573043900. Its totient is φ = 207849198304.

The previous prime is 210211121059. The next prime is 210211121137. The reversal of 210211121101 is 101121112012.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 11540345476 + 198670775625 = 107426^2 + 445725^2 .

It is a cyclic number.

It is not a de Polignac number, because 210211121101 - 2¹⁷ = 210210990029 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210211121171) 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, 1180961266 + ... + 1180961443.

It is an arithmetic number, because the mean of its divisors is an integer number (53143260975).

Almost surely, 2^210211121101 is an apocalyptic number.

It is an amenable number.

210211121101 is a deficient number, since it is larger than the sum of its proper divisors (2361922799).

210211121101 is an equidigital number, since it uses as much as digits as its factorization.

210211121101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2361922798.

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

Adding to 210211121101 its reverse (101121112012), we get a palindrome (311332233113).

It can be divided in two parts, 2102111 and 21101, that added together give a palindrome (2123212).

The spelling of 210211121101 in words is "two hundred ten billion, two hundred eleven million, one hundred twenty-one thousand, one hundred one".