211121101021 has 8 divisors (see below), whose sum is σ = 218990224640. Its totient is φ = 203386492512.

The previous prime is 211121101013. The next prime is 211121101033. The reversal of 211121101021 is 120101121112.

It is a happy number.

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 211121101021 - 2³ = 211121101013 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 211121100992 and 211121101010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211121101091) 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, 33625581 + ... + 33631858.

It is an arithmetic number, because the mean of its divisors is an integer number (27373778080).

Almost surely, 2^211121101021 is an apocalyptic number.

It is an amenable number.

211121101021 is a deficient number, since it is larger than the sum of its proper divisors (7869123619).

211121101021 is an equidigital number, since it uses as much as digits as its factorization.

211121101021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67257555.

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

Adding to 211121101021 its reverse (120101121112), we get a palindrome (331222222133).

The spelling of 211121101021 in words is "two hundred eleven billion, one hundred twenty-one million, one hundred one thousand, twenty-one".