121131101040 has 80 divisors (see below), whose sum is σ = 375589273248. Its totient is φ = 32294499328.

The previous prime is 121131100973. The next prime is 121131101057. The reversal of 121131101040 is 40101131121.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1082602 + ... + 1189238.

Almost surely, 2^121131101040 is an apocalyptic number.

121131101040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121131101040 is an abundant number, since it is smaller than the sum of its proper divisors (254458172208).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121131101040 is a wasteful number, since it uses less digits than its factorization.

121131101040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111386 (or 111380 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 15.

Adding to 121131101040 its reverse (40101131121), we get a palindrome (161232232161).

The spelling of 121131101040 in words is "one hundred twenty-one billion, one hundred thirty-one million, one hundred one thousand, forty".