1211798902 has 16 divisors (see below), whose sum is σ = 1841205600. Its totient is φ = 598086720.

The previous prime is 1211798899. The next prime is 1211798957. The reversal of 1211798902 is 2098971121.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 106924 + ... + 117712.

It is an arithmetic number, because the mean of its divisors is an integer number (115075350).

Almost surely, 2^1211798902 is an apocalyptic number.

1211798902 is a deficient number, since it is larger than the sum of its proper divisors (629406698).

1211798902 is a wasteful number, since it uses less digits than its factorization.

1211798902 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11511.

The product of its (nonzero) digits is 18144, while the sum is 40.

The square root of 1211798902 is about 34810.9020566833. The cubic root of 1211798902 is about 1066.1300507674.

The spelling of 1211798902 in words is "one billion, two hundred eleven million, seven hundred ninety-eight thousand, nine hundred two".