211211111020101 has 16 divisors (see below), whose sum is σ = 282481824756096. Its totient is φ = 140374401463296.

The previous prime is 211211111020061. The next prime is 211211111020153. The reversal of 211211111020101 is 101020111112112.

It is not a de Polignac number, because 211211111020101 - 2³⁸ = 210936233113157 is a prime.

It is a super-2 number, since 2×211211111020101² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211211111020181) 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, 60700020 + ... + 64085213.

It is an arithmetic number, because the mean of its divisors is an integer number (17655114047256).

Almost surely, 2^{211211111020101} is an apocalyptic number.

It is an amenable number.

211211111020101 is a deficient number, since it is larger than the sum of its proper divisors (71270713735995).

211211111020101 is a wasteful number, since it uses less digits than its factorization.

211211111020101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124786972.

The product of its (nonzero) digits is 8, while the sum is 15.

Adding to 211211111020101 its reverse (101020111112112), we get a palindrome (312231222132213).

The spelling of 211211111020101 in words is "two hundred eleven trillion, two hundred eleven billion, one hundred eleven million, twenty thousand, one hundred one".