1221400132 has 6 divisors (see below), whose sum is σ = 2137450238. Its totient is φ = 610700064.

The previous prime is 1221400097. The next prime is 1221400153. The reversal of 1221400132 is 2310041221.

It can be written as a sum of positive squares in only one way, i.e., 686125636 + 535274496 = 26194^2 + 23136^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 152675013 + ... + 152675020.

Almost surely, 2^1221400132 is an apocalyptic number.

It is an amenable number.

1221400132 is a deficient number, since it is larger than the sum of its proper divisors (916050106).

1221400132 is a wasteful number, since it uses less digits than its factorization.

1221400132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 305350037 (or 305350035 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 1221400132 is about 34948.5354771842. The cubic root of 1221400132 is about 1068.9383396316.

Adding to 1221400132 its reverse (2310041221), we get a palindrome (3531441353).

The spelling of 1221400132 in words is "one billion, two hundred twenty-one million, four hundred thousand, one hundred thirty-two".