1900021220103 has 16 divisors (see below), whose sum is σ = 2625749157600. Its totient is φ = 1220654722560.

The previous prime is 1900021220101. The next prime is 1900021220113. The reversal of 1900021220103 is 3010221200091.

It is not a de Polignac number, because 1900021220103 - 2¹ = 1900021220101 is a prime.

It is a super-2 number, since 2×1900021220103² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1900021220103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1900021220101) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20913718 + ... + 21004371.

It is an arithmetic number, because the mean of its divisors is an integer number (164109322350).

Almost surely, 2^{1900021220103} is an apocalyptic number.

1900021220103 is a deficient number, since it is larger than the sum of its proper divisors (725727937497).

1900021220103 is a wasteful number, since it uses less digits than its factorization.

1900021220103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41918642.

The product of its (nonzero) digits is 216, while the sum is 21.

Adding to 1900021220103 its reverse (3010221200091), we get a palindrome (4910242420194).

The spelling of 1900021220103 in words is "one trillion, nine hundred billion, twenty-one million, two hundred twenty thousand, one hundred three".