1901101123 has 4 divisors (see below), whose sum is σ = 1902191080. Its totient is φ = 1900011168.

The previous prime is 1901101057. The next prime is 1901101141. The reversal of 1901101123 is 3211011091.

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

It is a cyclic number.

It is not a de Polignac number, because 1901101123 - 2⁹ = 1901100611 is a prime.

It is a super-2 number, since 2×1901101123² = 7228370959743722258, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1901101123.

It is not an unprimeable number, because it can be changed into a prime (1901101523) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 542358 + ... + 545851.

It is an arithmetic number, because the mean of its divisors is an integer number (475547770).

Almost surely, 2^1901101123 is an apocalyptic number.

1901101123 is a deficient number, since it is larger than the sum of its proper divisors (1089957).

1901101123 is a wasteful number, since it uses less digits than its factorization.

1901101123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1089956.

The product of its (nonzero) digits is 54, while the sum is 19.

The square root of 1901101123 is about 43601.6183529924. The cubic root of 1901101123 is about 1238.8015482430.

The spelling of 1901101123 in words is "one billion, nine hundred one million, one hundred one thousand, one hundred twenty-three".