1212120001099 has 16 divisors (see below), whose sum is σ = 1445758248960. Its totient is φ = 993616858080.

The previous prime is 1212120001097. The next prime is 1212120001123. The reversal of 1212120001099 is 9901000212121.

It is not a de Polignac number, because 1212120001099 - 2¹ = 1212120001097 is a prime.

It is a super-2 number, since 2×1212120001099² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1212120001097) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 295389 + ... + 1584769.

It is an arithmetic number, because the mean of its divisors is an integer number (90359890560).

Almost surely, 2^{1212120001099} is an apocalyptic number.

1212120001099 is a deficient number, since it is larger than the sum of its proper divisors (233638247861).

1212120001099 is a wasteful number, since it uses less digits than its factorization.

1212120001099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1295250.

The product of its (nonzero) digits is 648, while the sum is 28.

The spelling of 1212120001099 in words is "one trillion, two hundred twelve billion, one hundred twenty million, one thousand, ninety-nine".