11111021203131 has 48 divisors (see below), whose sum is σ = 16815732098880. Its totient is φ = 7056254684160.

The previous prime is 11111021203111. The next prime is 11111021203151. The reversal of 11111021203131 is 13130212011111.

It is an interprime number because it is at equal distance from previous prime (11111021203111) and next prime (11111021203151).

It is not a de Polignac number, because 11111021203131 - 2¹⁹ = 11111020678843 is a prime.

It is a super-2 number, since 2×11111021203131² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (11111021203111) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 119734791 + ... + 119827551.

It is an arithmetic number, because the mean of its divisors is an integer number (350327752060).

Almost surely, 2^{11111021203131} is an apocalyptic number.

11111021203131 is a deficient number, since it is larger than the sum of its proper divisors (5704710895749).

11111021203131 is a wasteful number, since it uses less digits than its factorization.

11111021203131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95156 (or 95153 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 18.

Adding to 11111021203131 its reverse (13130212011111), we get a palindrome (24241233214242).

The spelling of 11111021203131 in words is "eleven trillion, one hundred eleven billion, twenty-one million, two hundred three thousand, one hundred thirty-one".