1221050701 has 8 divisors (see below), whose sum is σ = 1323355544. Its totient is φ = 1119942720.

The previous prime is 1221050693. The next prime is 1221050707. The reversal of 1221050701 is 1070501221.

It can be written as a sum of positive squares in 4 ways, for example, as 63282025 + 1157768676 = 7955^2 + 34026^2 .

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

It is not a de Polignac number, because 1221050701 - 2³ = 1221050693 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221050707) 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, 297090 + ... + 301171.

It is an arithmetic number, because the mean of its divisors is an integer number (165419443).

Almost surely, 2^1221050701 is an apocalyptic number.

It is an amenable number.

1221050701 is a deficient number, since it is larger than the sum of its proper divisors (102304843).

1221050701 is a wasteful number, since it uses less digits than its factorization.

1221050701 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 598431.

The product of its (nonzero) digits is 140, while the sum is 19.

The square root of 1221050701 is about 34943.5358972157. The cubic root of 1221050701 is about 1068.8363922001.

Adding to 1221050701 its reverse (1070501221), we get a palindrome (2291551922).

The spelling of 1221050701 in words is "one billion, two hundred twenty-one million, fifty thousand, seven hundred one".