121401244650 has 96 divisors (see below), whose sum is σ = 344566517760. Its totient is φ = 27710089920.

The previous prime is 121401244583. The next prime is 121401244663. The reversal of 121401244650 is 56442104121.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 674547 + ... + 835353.

It is an arithmetic number, because the mean of its divisors is an integer number (3589234560).

Almost surely, 2^121401244650 is an apocalyptic number.

121401244650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 121401244650, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (172283258880).

121401244650 is an abundant number, since it is smaller than the sum of its proper divisors (223165273110).

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

121401244650 is a wasteful number, since it uses less digits than its factorization.

121401244650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161548 (or 161543 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 30.

Adding to 121401244650 its reverse (56442104121), we get a palindrome (177843348771).

The spelling of 121401244650 in words is "one hundred twenty-one billion, four hundred one million, two hundred forty-four thousand, six hundred fifty".