1201011021099 has 24 divisors (see below), whose sum is σ = 1784459862432. Its totient is φ = 777818695680.

The previous prime is 1201011021097. The next prime is 1201011021103. The reversal of 1201011021099 is 9901201101021.

It is not a de Polignac number, because 1201011021099 - 2¹ = 1201011021097 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1201011021097) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2599839 + ... + 3026744.

It is an arithmetic number, because the mean of its divisors is an integer number (74352494268).

Almost surely, 2^{1201011021099} is an apocalyptic number.

1201011021099 is a deficient number, since it is larger than the sum of its proper divisors (583448841333).

1201011021099 is a wasteful number, since it uses less digits than its factorization.

1201011021099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5627267 (or 5627264 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 27.

The spelling of 1201011021099 in words is "one trillion, two hundred one billion, eleven million, twenty-one thousand, ninety-nine".