400121220201 has 8 divisors (see below), whose sum is σ = 538994908704. Its totient is φ = 263997505920.

The previous prime is 400121220151. The next prime is 400121220211. The reversal of 400121220201 is 102022121004.

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

It is not a de Polignac number, because 400121220201 - 2²³ = 400112831593 is a prime.

It is not an unprimeable number, because it can be changed into a prime (400121220211) 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, 687493215 + ... + 687493796.

It is an arithmetic number, because the mean of its divisors is an integer number (67374363588).

Almost surely, 2^400121220201 is an apocalyptic number.

It is an amenable number.

400121220201 is a deficient number, since it is larger than the sum of its proper divisors (138873688503).

400121220201 is a wasteful number, since it uses less digits than its factorization.

400121220201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1374987111.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 400121220201 its reverse (102022121004), we get a palindrome (502143341205).

The spelling of 400121220201 in words is "four hundred billion, one hundred twenty-one million, two hundred twenty thousand, two hundred one".