209213970120 has 192 divisors, whose sum is σ = 707391659520. Its totient is φ = 55611339264.

The previous prime is 209213970113. The next prime is 209213970151. The reversal of 209213970120 is 21079312902.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3007977 + ... + 3076743.

It is an arithmetic number, because the mean of its divisors is an integer number (3684331560).

Almost surely, 2^209213970120 is an apocalyptic number.

209213970120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 209213970120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (353695829760).

209213970120 is an abundant number, since it is smaller than the sum of its proper divisors (498177689400).

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

209213970120 is a wasteful number, since it uses less digits than its factorization.

209213970120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69106 (or 69090 counting only the distinct ones).

The product of its (nonzero) digits is 13608, while the sum is 36.

The spelling of 209213970120 in words is "two hundred nine billion, two hundred thirteen million, nine hundred seventy thousand, one hundred twenty".