121222451 has 16 divisors (see below), whose sum is σ = 147264000. Its totient is φ = 97469568.

The previous prime is 121222421. The next prime is 121222457. The reversal of 121222451 is 154222121.

It is a de Polignac number, because none of the positive numbers 2^k-121222451 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121222457) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9275 + ... + 18123.

It is an arithmetic number, because the mean of its divisors is an integer number (9204000).

Almost surely, 2^121222451 is an apocalyptic number.

121222451 is a deficient number, since it is larger than the sum of its proper divisors (26041549).

121222451 is a wasteful number, since it uses less digits than its factorization.

121222451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8978.

The product of its digits is 320, while the sum is 20.

The square root of 121222451 is about 11010.1067660582. The cubic root of 121222451 is about 494.9116612756.

Adding to 121222451 its reverse (154222121), we get a palindrome (275444572).

The spelling of 121222451 in words is "one hundred twenty-one million, two hundred twenty-two thousand, four hundred fifty-one".