1401123121 has 2 divisors, whose sum is σ = 1401123122. Its totient is φ = 1401123120.

The previous prime is 1401123103. The next prime is 1401123127. The reversal of 1401123121 is 1213211041.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1246866721 + 154256400 = 35311^2 + 12420^2 .

It is a cyclic number.

It is not a de Polignac number, because 1401123121 - 2¹⁹ = 1400598833 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1401123095 and 1401123104.

It is not a weakly prime, because it can be changed into another prime (1401123127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 700561560 + 700561561.

It is an arithmetic number, because the mean of its divisors is an integer number (700561561).

Almost surely, 2^1401123121 is an apocalyptic number.

It is an amenable number.

1401123121 is a deficient number, since it is larger than the sum of its proper divisors (1).

1401123121 is an equidigital number, since it uses as much as digits as its factorization.

1401123121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48, while the sum is 16.

The square root of 1401123121 is about 37431.5791945785. The cubic root of 1401123121 is about 1118.9880104655.

Adding to 1401123121 its reverse (1213211041), we get a palindrome (2614334162).

The spelling of 1401123121 in words is "one billion, four hundred one million, one hundred twenty-three thousand, one hundred twenty-one".