121001601634 has 4 divisors (see below), whose sum is σ = 181502402454. Its totient is φ = 60500800816.

The previous prime is 121001601629. The next prime is 121001601647. The reversal of 121001601634 is 436106100121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 436106100121 = 103 ⋅4234039807.

It can be written as a sum of positive squares in only one way, i.e., 84766575609 + 36235026025 = 291147^2 + 190355^2 .

It is a junction number, because it is equal to n+sod(n) for n = 121001601599 and 121001601608.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30250400407 + ... + 30250400410.

Almost surely, 2^121001601634 is an apocalyptic number.

121001601634 is a deficient number, since it is larger than the sum of its proper divisors (60500800820).

121001601634 is an equidigital number, since it uses as much as digits as its factorization.

121001601634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60500800819.

The product of its (nonzero) digits is 864, while the sum is 25.

Adding to 121001601634 its reverse (436106100121), we get a palindrome (557107701755).

The spelling of 121001601634 in words is "one hundred twenty-one billion, one million, six hundred one thousand, six hundred thirty-four".