1229112891090 has 128 divisors (see below), whose sum is σ = 3761412272640. Its totient is φ = 279774259200.

The previous prime is 1229112891037. The next prime is 1229112891107. The reversal of 1229112891090 is 901982119221.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 893731 + ... + 1804710.

It is an arithmetic number, because the mean of its divisors is an integer number (29386033380).

Almost surely, 2^{1229112891090} is an apocalyptic number.

1229112891090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1229112891090 is an abundant number, since it is smaller than the sum of its proper divisors (2532299381550).

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

1229112891090 is a wasteful number, since it uses less digits than its factorization.

1229112891090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2698705 (or 2698699 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 45.

The spelling of 1229112891090 in words is "one trillion, two hundred twenty-nine billion, one hundred twelve million, eight hundred ninety-one thousand, ninety".