1901111121201 has 8 divisors (see below), whose sum is σ = 2683921582944. Its totient is φ = 1192854036800.

The previous prime is 1901111121179. The next prime is 1901111121211. The reversal of 1901111121201 is 1021211111091.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1901111121201 - 2²³ = 1901102732593 is a prime.

It is a super-2 number, since 2×1901111121201² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1901111121211) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18638344275 + ... + 18638344376.

It is an arithmetic number, because the mean of its divisors is an integer number (335490197868).

Almost surely, 2^{1901111121201} is an apocalyptic number.

It is an amenable number.

1901111121201 is a deficient number, since it is larger than the sum of its proper divisors (782810461743).

1901111121201 is a wasteful number, since it uses less digits than its factorization.

1901111121201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37276688671.

The product of its (nonzero) digits is 36, while the sum is 21.

Adding to 1901111121201 its reverse (1021211111091), we get a palindrome (2922322232292).

The spelling of 1901111121201 in words is "one trillion, nine hundred one billion, one hundred eleven million, one hundred twenty-one thousand, two hundred one".