1212111021099 has 64 divisors (see below), whose sum is σ = 1839766072320. Its totient is φ = 703338577920.

The previous prime is 1212111021053. The next prime is 1212111021101. The reversal of 1212111021099 is 9901201112121.

It is not a de Polignac number, because 1212111021099 - 2⁸ = 1212111020843 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1212111021019) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 39113899 + ... + 39144875.

It is an arithmetic number, because the mean of its divisors is an integer number (28746344880).

Almost surely, 2^{1212111021099} is an apocalyptic number.

1212111021099 is a deficient number, since it is larger than the sum of its proper divisors (627655051221).

1212111021099 is a wasteful number, since it uses less digits than its factorization.

1212111021099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31540.

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

The spelling of 1212111021099 in words is "one trillion, two hundred twelve billion, one hundred eleven million, twenty-one thousand, ninety-nine".