201212102101 has 32 divisors (see below), whose sum is σ = 212321894400. Its totient is φ = 190438871040.

The previous prime is 201212102053. The next prime is 201212102173. The reversal of 201212102101 is 101201212102.

It is a cyclic number.

It is not a de Polignac number, because 201212102101 - 2¹¹ = 201212100053 is a prime.

It is a super-2 number, since 2×201212102101² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201212102801) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 261653845 + ... + 261654613.

It is an arithmetic number, because the mean of its divisors is an integer number (6635059200).

Almost surely, 2^201212102101 is an apocalyptic number.

It is an amenable number.

201212102101 is a deficient number, since it is larger than the sum of its proper divisors (11109792299).

201212102101 is a wasteful number, since it uses less digits than its factorization.

201212102101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1609.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 201212102101 its reverse (101201212102), we get a palindrome (302413314203).

It can be divided in two parts, 201212102 and 101, that multiplied together give a palindrome (20322422302).

The spelling of 201212102101 in words is "two hundred one billion, two hundred twelve million, one hundred two thousand, one hundred one".