1221050250142 has 8 divisors (see below), whose sum is σ = 1832976737496. Its totient is φ = 610058004312.

The previous prime is 1221050250031. The next prime is 1221050250143. The reversal of 1221050250142 is 2410520501221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221050250143) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 233557113 + ... + 233562340.

It is an arithmetic number, because the mean of its divisors is an integer number (229122092187).

Almost surely, 2^{1221050250142} is an apocalyptic number.

1221050250142 is a deficient number, since it is larger than the sum of its proper divisors (611926487354).

1221050250142 is a wasteful number, since it uses less digits than its factorization.

1221050250142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 467120762.

The product of its (nonzero) digits is 1600, while the sum is 25.

Adding to 1221050250142 its reverse (2410520501221), we get a palindrome (3631570751363).

The spelling of 1221050250142 in words is "one trillion, two hundred twenty-one billion, fifty million, two hundred fifty thousand, one hundred forty-two".