1240102212155 has 16 divisors (see below), whose sum is σ = 1553191433280. Its totient is φ = 948723017088.

The previous prime is 1240102212143. The next prime is 1240102212227. The reversal of 1240102212155 is 5512122010421.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1240102212155 - 2²⁰ = 1240101163579 is a prime.

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, 788612 + ... + 1761281.

It is an arithmetic number, because the mean of its divisors is an integer number (97074464580).

Almost surely, 2^{1240102212155} is an apocalyptic number.

1240102212155 is a deficient number, since it is larger than the sum of its proper divisors (313089221125).

1240102212155 is a wasteful number, since it uses less digits than its factorization.

1240102212155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2554150.

The product of its (nonzero) digits is 1600, while the sum is 26.

Adding to 1240102212155 its reverse (5512122010421), we get a palindrome (6752224222576).

The spelling of 1240102212155 in words is "one trillion, two hundred forty billion, one hundred two million, two hundred twelve thousand, one hundred fifty-five".