201021120190 has 64 divisors (see below), whose sum is σ = 396809280000. Its totient is φ = 72715012480.

The previous prime is 201021120149. The next prime is 201021120203. The reversal of 201021120190 is 91021120102.

It is a happy number.

It is a super-2 number, since 2×201021120190² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 16540236 + ... + 16552384.

It is an arithmetic number, because the mean of its divisors is an integer number (6200145000).

Almost surely, 2^201021120190 is an apocalyptic number.

201021120190 is a deficient number, since it is larger than the sum of its proper divisors (195788159810).

201021120190 is a wasteful number, since it uses less digits than its factorization.

201021120190 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12945.

The product of its (nonzero) digits is 72, while the sum is 19.

Adding to 201021120190 its reverse (91021120102), we get a palindrome (292042240292).

The spelling of 201021120190 in words is "two hundred one billion, twenty-one million, one hundred twenty thousand, one hundred ninety".