1900021201202 has 4 divisors (see below), whose sum is σ = 2850031801806. Its totient is φ = 950010600600.

The previous prime is 1900021201181. The next prime is 1900021201213. The reversal of 1900021201202 is 2021021200091.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1887549002161 + 12472199041 = 1373881^2 + 111679^2 .

It is a super-2 number, since 2×1900021201202² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 475005300299 + ... + 475005300302.

Almost surely, 2^{1900021201202} is an apocalyptic number.

1900021201202 is a deficient number, since it is larger than the sum of its proper divisors (950010600604).

1900021201202 is an equidigital number, since it uses as much as digits as its factorization.

1900021201202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 950010600603.

The product of its (nonzero) digits is 144, while the sum is 20.

Adding to 1900021201202 its reverse (2021021200091), we get a palindrome (3921042401293).

The spelling of 1900021201202 in words is "one trillion, nine hundred billion, twenty-one million, two hundred one thousand, two hundred two".