1201131012123 has 48 divisors (see below), whose sum is σ = 2100004111296. Its totient is φ = 645817743360.

The previous prime is 1201131012119. The next prime is 1201131012131. The reversal of 1201131012123 is 3212101311021.

It is not a de Polignac number, because 1201131012123 - 2² = 1201131012119 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1201131012096 and 1201131012105.

It is not an unprimeable number, because it can be changed into a prime (1201131012023) 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, 4012065 + ... + 4301037.

It is an arithmetic number, because the mean of its divisors is an integer number (43750085652).

Almost surely, 2^{1201131012123} is an apocalyptic number.

1201131012123 is a deficient number, since it is larger than the sum of its proper divisors (898873099173).

1201131012123 is a wasteful number, since it uses less digits than its factorization.

1201131012123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 292884 (or 292881 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

Adding to 1201131012123 its reverse (3212101311021), we get a palindrome (4413232323144).

The spelling of 1201131012123 in words is "one trillion, two hundred one billion, one hundred thirty-one million, twelve thousand, one hundred twenty-three".