210021101211 has 16 divisors (see below), whose sum is σ = 300328093440. Its totient is φ = 130142170080.

The previous prime is 210021101207. The next prime is 210021101233. The reversal of 210021101211 is 112101120012.

It is not a de Polignac number, because 210021101211 - 2² = 210021101207 is a prime.

It is a super-2 number, since 2×210021101211² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (210021101281) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34757175 + ... + 34763216.

It is an arithmetic number, because the mean of its divisors is an integer number (18770505840).

Almost surely, 2^210021101211 is an apocalyptic number.

210021101211 is a deficient number, since it is larger than the sum of its proper divisors (90306992229).

210021101211 is a wasteful number, since it uses less digits than its factorization.

210021101211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69520466.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 210021101211 its reverse (112101120012), we get a palindrome (322122221223).

The spelling of 210021101211 in words is "two hundred ten billion, twenty-one million, one hundred one thousand, two hundred eleven".