211201021110101 has 6 divisors (see below), whose sum is σ = 232146576922806. Its totient is φ = 192000928281800.

The previous prime is 211201021109983. The next prime is 211201021110127. The reversal of 211201021110101 is 101011120102112.

It can be written as a sum of positive squares in only one way, i.e., 157454161109476 + 53746860000625 = 12548074^2 + 7331225^2 .

It is not a de Polignac number, because 211201021110101 - 2²⁶ = 211200954001237 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 (211201021110151) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 872731492070 + ... + 872731492311.

It is an arithmetic number, because the mean of its divisors is an integer number (38691096153801).

Almost surely, 2^{211201021110101} is an apocalyptic number.

It is an amenable number.

211201021110101 is a deficient number, since it is larger than the sum of its proper divisors (20945555812705).

211201021110101 is a wasteful number, since it uses less digits than its factorization.

211201021110101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1745462984403 (or 1745462984392 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 211201021110101 its reverse (101011120102112), we get a palindrome (312212141212213).

The spelling of 211201021110101 in words is "two hundred eleven trillion, two hundred one billion, twenty-one million, one hundred ten thousand, one hundred one".