1212010001001 has 12 divisors (see below), whose sum is σ = 1751804084160. Its totient is φ = 807488372760.

The previous prime is 1212010000967. The next prime is 1212010001047. The reversal of 1212010001001 is 1001000102121.

It is a happy number.

It is not a de Polignac number, because 1212010001001 - 2⁹ = 1212010000489 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 (1212010001101) 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, 43176405 + ... + 43204466.

It is an arithmetic number, because the mean of its divisors is an integer number (145983673680).

Almost surely, 2^{1212010001001} is an apocalyptic number.

It is an amenable number.

1212010001001 is a deficient number, since it is larger than the sum of its proper divisors (539794083159).

1212010001001 is a wasteful number, since it uses less digits than its factorization.

1212010001001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86382436 (or 86382433 counting only the distinct ones).

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

Adding to 1212010001001 its reverse (1001000102121), we get a palindrome (2213010103122).

The spelling of 1212010001001 in words is "one trillion, two hundred twelve billion, ten million, one thousand, one".