121401081 has 12 divisors (see below), whose sum is σ = 175708260. Its totient is φ = 80772000.

The previous prime is 121401079. The next prime is 121401101. The reversal of 121401081 is 180104121.

It can be written as a sum of positive squares in 2 ways, for example, as 71571600 + 49829481 = 8460^2 + 7059^2 .

It is not a de Polignac number, because 121401081 - 2¹ = 121401079 is a prime.

It is a super-2 number, since 2×121401081² = 29476444935937122, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (121401011) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8670 + ... + 17831.

It is an arithmetic number, because the mean of its divisors is an integer number (14642355).

Almost surely, 2^121401081 is an apocalyptic number.

It is an amenable number.

121401081 is a deficient number, since it is larger than the sum of its proper divisors (54307179).

121401081 is a wasteful number, since it uses less digits than its factorization.

121401081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27016 (or 27013 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

The square root of 121401081 is about 11018.2158719096. The cubic root of 121401081 is about 495.1546379426.

The spelling of 121401081 in words is "one hundred twenty-one million, four hundred one thousand, eighty-one".