121401452247 has 16 divisors (see below), whose sum is σ = 169061124480. Its totient is φ = 77412190752.

The previous prime is 121401452243. The next prime is 121401452303. The reversal of 121401452247 is 742254104121.

It is not a de Polignac number, because 121401452247 - 2² = 121401452243 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121401452243) 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, 9262153 + ... + 9275250.

It is an arithmetic number, because the mean of its divisors is an integer number (10566320280).

Almost surely, 2^121401452247 is an apocalyptic number.

121401452247 is a deficient number, since it is larger than the sum of its proper divisors (47659672233).

121401452247 is a wasteful number, since it uses less digits than its factorization.

121401452247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18537502.

The product of its (nonzero) digits is 17920, while the sum is 33.

Adding to 121401452247 its reverse (742254104121), we get a palindrome (863655556368).

The spelling of 121401452247 in words is "one hundred twenty-one billion, four hundred one million, four hundred fifty-two thousand, two hundred forty-seven".