1202121121986 has 48 divisors (see below), whose sum is σ = 2701605711168. Its totient is φ = 400626421200.

The previous prime is 1202121121843. The next prime is 1202121122071. The reversal of 1202121121986 is 6891211212021.

It is a self number, because there is not a number n which added to its sum of digits gives 1202121121986.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2193891 + ... + 2686521.

It is an arithmetic number, because the mean of its divisors is an integer number (56283452316).

Almost surely, 2^{1202121121986} is an apocalyptic number.

1202121121986 is an abundant number, since it is smaller than the sum of its proper divisors (1499484589182).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1202121121986 is an equidigital number, since it uses as much as digits as its factorization.

1202121121986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 497669 (or 497657 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 36.

The spelling of 1202121121986 in words is "one trillion, two hundred two billion, one hundred twenty-one million, one hundred twenty-one thousand, nine hundred eighty-six".