1011012212101 has 4 divisors (see below), whose sum is σ = 1011407604652. Its totient is φ = 1010616819552.

The previous prime is 1011012212099. The next prime is 1011012212113. The reversal of 1011012212101 is 1012122101101.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 363307562500 + 647704649601 = 602750^2 + 804801^2 .

It is a cyclic number.

It is not a de Polignac number, because 1011012212101 - 2¹ = 1011012212099 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 (1011012212131) 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, 197692440 + ... + 197697553.

It is an arithmetic number, because the mean of its divisors is an integer number (252851901163).

Almost surely, 2^{1011012212101} is an apocalyptic number.

It is an amenable number.

1011012212101 is a deficient number, since it is larger than the sum of its proper divisors (395392551).

1011012212101 is an equidigital number, since it uses as much as digits as its factorization.

1011012212101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 395392550.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 1011012212101 its reverse (1012122101101), we get a palindrome (2023134313202).

The spelling of 1011012212101 in words is "one trillion, eleven billion, twelve million, two hundred twelve thousand, one hundred one".