1212000101001 has 12 divisors (see below), whose sum is σ = 1750680917700. Its totient is φ = 807993557280.

The previous prime is 1212000100967. The next prime is 1212000101009. The reversal of 1212000101001 is 1001010002121.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 714234575376 + 497765525625 = 845124^2 + 705525^2 .

It is not a de Polignac number, because 1212000101001 - 2¹⁵ = 1212000068233 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is not an unprimeable number, because it can be changed into a prime (1212000101009) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 815511 + ... + 1757571.

It is an arithmetic number, because the mean of its divisors is an integer number (145890076475).

Almost surely, 2^{1212000101001} is an apocalyptic number.

It is an amenable number.

1212000101001 is a deficient number, since it is larger than the sum of its proper divisors (538680816699).

1212000101001 is a wasteful number, since it uses less digits than its factorization.

1212000101001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1085016 (or 1085013 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 1212000101001 its reverse (1001010002121), we get a palindrome (2213010103122).

The spelling of 1212000101001 in words is "one trillion, two hundred twelve billion, one hundred one thousand, one".