1421541021242 has 4 divisors (see below), whose sum is σ = 2132311531866. Its totient is φ = 710770510620.

The previous prime is 1421541021233. The next prime is 1421541021247. The reversal of 1421541021242 is 2421201451241.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1360981225321 + 60559795921 = 1166611^2 + 246089^2 .

It is not an unprimeable number, because it can be changed into a prime (1421541021247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 355385255309 + ... + 355385255312.

Almost surely, 2^{1421541021242} is an apocalyptic number.

1421541021242 is a deficient number, since it is larger than the sum of its proper divisors (710770510624).

1421541021242 is an equidigital number, since it uses as much as digits as its factorization.

1421541021242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 710770510623.

The product of its (nonzero) digits is 5120, while the sum is 29.

Adding to 1421541021242 its reverse (2421201451241), we get a palindrome (3842742472483).

The spelling of 1421541021242 in words is "one trillion, four hundred twenty-one billion, five hundred forty-one million, twenty-one thousand, two hundred forty-two".