1212011121099 has 16 divisors (see below), whose sum is σ = 1661697911808. Its totient is φ = 785218688352.

The previous prime is 1212011121091. The next prime is 1212011121103. The reversal of 1212011121099 is 9901211102121.

It is not a de Polignac number, because 1212011121099 - 2³ = 1212011121091 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1212011121091) 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, 6509787 + ... + 6693380.

It is an arithmetic number, because the mean of its divisors is an integer number (103856119488).

Almost surely, 2^{1212011121099} is an apocalyptic number.

1212011121099 is a deficient number, since it is larger than the sum of its proper divisors (449686790709).

1212011121099 is a wasteful number, since it uses less digits than its factorization.

1212011121099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13204034.

The product of its (nonzero) digits is 648, while the sum is 30.

The spelling of 1212011121099 in words is "one trillion, two hundred twelve billion, eleven million, one hundred twenty-one thousand, ninety-nine".