1390121101001 has 8 divisors (see below), whose sum is σ = 1394907985440. Its totient is φ = 1385338704448.

The previous prime is 1390121100967. The next prime is 1390121101013. The reversal of 1390121101001 is 1001011210931.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1390121101001 - 2¹⁸ = 1390120838857 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1390121101081) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 500816 + ... + 1740993.

It is an arithmetic number, because the mean of its divisors is an integer number (174363498180).

Almost surely, 2^{1390121101001} is an apocalyptic number.

It is an amenable number.

1390121101001 is a deficient number, since it is larger than the sum of its proper divisors (4786884439).

1390121101001 is a wasteful number, since it uses less digits than its factorization.

1390121101001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2243943.

The product of its (nonzero) digits is 54, while the sum is 20.

Adding to 1390121101001 its reverse (1001011210931), we get a palindrome (2391132311932).

The spelling of 1390121101001 in words is "one trillion, three hundred ninety billion, one hundred twenty-one million, one hundred one thousand, one".