20100203111031 has 8 divisors (see below), whose sum is σ = 26806886548224. Its totient is φ = 13396827540600.

The previous prime is 20100203110997. The next prime is 20100203111101. The reversal of 20100203111031 is 13011130200102.

It is a happy number.

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

It is not a de Polignac number, because 20100203111031 - 2⁷ = 20100203110903 is a prime.

It is a super-2 number, since 2×20100203111031² (a number of 27 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 20100203111031.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20100203111431) 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, 826952511 + ... + 826976816.

It is an arithmetic number, because the mean of its divisors is an integer number (3350860818528).

Almost surely, 2^{20100203111031} is an apocalyptic number.

20100203111031 is a deficient number, since it is larger than the sum of its proper divisors (6706683437193).

20100203111031 is a wasteful number, since it uses less digits than its factorization.

20100203111031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1653933381.

The product of its (nonzero) digits is 36, while the sum is 15.

Adding to 20100203111031 its reverse (13011130200102), we get a palindrome (33111333311133).

The spelling of 20100203111031 in words is "twenty trillion, one hundred billion, two hundred three million, one hundred eleven thousand, thirty-one".