101020012111 has 4 divisors (see below), whose sum is σ = 101041634592. Its totient is φ = 100998389632.

The previous prime is 101020012109. The next prime is 101020012129. The reversal of 101020012111 is 111210020101.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 111210020101 = 21163 ⋅5254927.

It is a cyclic number.

It is not a de Polignac number, because 101020012111 - 2¹ = 101020012109 is a prime.

It is a super-3 number, since 3×101020012111³ (a number of 34 digits) contains 333 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 (101020012211) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10804231 + ... + 10813576.

It is an arithmetic number, because the mean of its divisors is an integer number (25260408648).

Almost surely, 2^101020012111 is an apocalyptic number.

101020012111 is a deficient number, since it is larger than the sum of its proper divisors (21622481).

101020012111 is an equidigital number, since it uses as much as digits as its factorization.

101020012111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21622480.

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 101020012111 its reverse (111210020101), we get a palindrome (212230032212).

The spelling of 101020012111 in words is "one hundred one billion, twenty million, twelve thousand, one hundred eleven".