121401012145 has 16 divisors (see below), whose sum is σ = 175255597440. Its totient is φ = 78865017984.

The previous prime is 121401012127. The next prime is 121401012157. The reversal of 121401012145 is 541210104121.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121401012145 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, 91278292 + ... + 91279621.

It is an arithmetic number, because the mean of its divisors is an integer number (10953474840).

Almost surely, 2^121401012145 is an apocalyptic number.

It is an amenable number.

121401012145 is a deficient number, since it is larger than the sum of its proper divisors (53854585295).

121401012145 is a wasteful number, since it uses less digits than its factorization.

121401012145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182557944.

The product of its (nonzero) digits is 320, while the sum is 22.

Adding to 121401012145 its reverse (541210104121), we get a palindrome (662611116266).

The spelling of 121401012145 in words is "one hundred twenty-one billion, four hundred one million, twelve thousand, one hundred forty-five".