1242122101040 has 40 divisors (see below), whose sum is σ = 2888192660208. Its totient is φ = 496804320000.

The previous prime is 1242122101039. The next prime is 1242122101057. The reversal of 1242122101040 is 401012212421.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 210074 + ... + 1590086.

Almost surely, 2^{1242122101040} is an apocalyptic number.

1242122101040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1242122101040 is an abundant number, since it is smaller than the sum of its proper divisors (1646070559168).

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

1242122101040 is a wasteful number, since it uses less digits than its factorization.

1242122101040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1391277 (or 1391271 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 1242122101040 its reverse (401012212421), we get a palindrome (1643134313461).

The spelling of 1242122101040 in words is "one trillion, two hundred forty-two billion, one hundred twenty-two million, one hundred one thousand, forty".